In Windows 8, Windows Defender is a built in antivirus software product that replaces Microsoft Security Essentials. Before Windows 8, Windows Defender featured antispyware capabilities and was not offering antivirus protection.

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Interaction between Windows Application Experience and Windows Defender leading to 100% disk active time

This has been driving me up the wall for some time, but I think I may have finally caught (one of) the instigator(s) in the act. Solutions already tried with no effect: I have run chkdsk I do ...
4
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2answers
71 views

Scan a network folder in Windows Defender (Windows 8.1) via command line?

In Windows 8.1, we can instruct Windows Defender to perform a custom scan, via command line, like this: MpCmdRun -Scan -ScanType 3 -File "D:\My Personal Docs" Can the same be done with network ...
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0answers
89 views

Windows 10: Turning off Windows Defender's Real-Time protection [duplicate]

Since the times of Windows 7 I'm used to turning off Windows Defender real-time protection, as it causes too much overhead. As a pro-user, I know what I download and I havn't caught a virus since the ...
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2answers
296 views

How to turn off Windows Defender permanently

Windows Defender keeps blocking and a thrid party software that I know isn't a treat. All my attempts to disable Windows Defender have failed. I've tried to : Go in the Windows Defender option and ...
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2answers
3k views

Windows 10 update - kaspersky internet security installation

I just got windows 10 update. This update seems to have removed my kaspersky internet security installation. Am I good to install it back as I am unable to remove windows defender?
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0answers
41 views

Whitelist VBScript files for Windows Defender

I've got a ton of VBScript files acting as the glue in my custom workflow set-up. Since upgrading to Windows 8.1, I've found Windows Defender to scan the execution of my custom scripts as well. I ...
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0answers
130 views

Windows Defender: Disable real time; keep scheduled and on demand scanning

I just upgraded to Win 10 (RTM build). I have disabled the built in AV's (Defender) real time protection because I do not run it, never did and have never gotten a virus (and I've had a computer for ...
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3answers
88 views

Windows defender isn't working

My Windows defender was turned off because of preinstalled antivirus. Then the antivirus expired and I want to turn it back on but I can't. Getting a message: "Your PC isn't monitoring because the ...
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1answer
30 views

Uninstalling VS2012 hangs on system restore point

I am trying to uninstall VS2012 on my dev VM and have tried the following so far: -Turned off Windows Defender completely -Disabled restore point creation in System Settings -Used the cmd prompt ...
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1answer
326 views

Windows defender virus & spyware definition not updating - Windows 8.1

An error with error code 0x8024402c is thrown each time while trying to update Windows Defender's virus & spyware definition. Checked the following for diagnosis, don't see any issues; No ...
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2answers
50 views

Stop Windows Defender deleting a legit VB script

I have wrote a little script that will automate downloading and running a program, however when invoking the script from command line, Windows Defender will enter the scene warning user that malware ...
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0answers
76 views

Windows Defender Service keeps stopping

Windows defender service keeps stopping all the time. After enabling it, it only runs for a couple of seconds but then stops automatically. I don't know what's the reason but I suspect malware ...
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0answers
182 views

Windows Defender Resource Usage / Code Integrity Warnings

So, for some context, I'm a little paranoid because a few days ago, I let a friend put together her PowerPoint presentation on my Windows 8.1 Pro N laptop, and when I had looked away for a moment, she ...
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1answer
36 views

Certain downloaded files take minutes to become usable

I'm on Windows 8.1 Pro, but this problem also happens on my W7 Premium computer. I sometimes download files but am unable to use them for 2-3 minutes after they've been downloaded. It happens ...
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1answer
124 views

Can Microsoft Anti-Virus really be disabled in Windows 8.1?

I have disabled all "Windows protector" anti virus features, at least as far as Microsoft will admit to me when I use the Action Center tray icon to disable it. However I still see MsMpEng.exe ...
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1answer
89 views

How do Malware like Coupon drop down land up in the Windows System without a trace in the Control Panel

I have the Windows Bit Defender updated and run Complete System scans biweekly. All the drivers and the operating System are up to date. In spite of this the Coupon drop down malware landed on my ...
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1answer
61 views

Windows Defender Waking Up Hard Drive

I have an external hard drive that I only use for storage, I almost never write data to it but it can be useful if I want to access some data that I have in it. When it’s possibile I’d like for the ...
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1answer
680 views

safe to delete windows defender scan and definition updates folders? Windows 7,8,8.1

It looks like WD keeps a history of all scans and keep older definition files. Is it ok to delete the content of these two folder and let WD rebuild their content. Anyway to disable WD to keep ...
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0answers
490 views

Recurring event in Event Log: “Windows Security Center Service could not stop Windows Defender”

I have recently set up a new development machine (Lenovo T440p laptop with Windows 8.1 Pro), and this event keeps getting logged to the Event Log (about once every 2.5 minutes): The Windows Security ...
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1answer
235 views

Can't Turn on Windows Defender - Error code 8050800d

My friend using an HP pavilion G, running Win7 64 bit version. Recently had to restore to factory defaults, due to unstable operating environment. Reinstalled all updates, to date. Using Windows ...
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5answers
34k views

Is it okay to run Windows Defender and another antivirus program at the same time?

We all know that it isn't recommended to run more than one antivirus program at a time. But since Windows Defender comes with Windows, is it safe to have it and another antivirus program (AVG, Avast) ...
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0answers
1k views

Windows 8 MsMpEng.exe high disk usage, uninstalled Defender, and now AvastSvc.exe

I recently disabled Windows Defender due to MsMpEng.exe randomly spiking up my computer's disk usage. I saw it from Task Manager->Details->I/O read and write bytes. The read bytes go as high as ...
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1answer
719 views

Allow Windows Defender to update automatically but not Windows [duplicate]

Windows 8. (Not Windows 8.1) I have Windows Update set to check for updates but not install them automatically. I get nearly daily notifications from Windows Update to install Defender updates. Can I ...
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1answer
5k views

How can I fix Windows Defender error code in Windows 8.1?

Windows Defender is giving me an error code 0x80073b01 and it will not start. I am not sure if this is caused by the OS language change that I did recently but I did a scan for virsuses with Norton ...
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1answer
9k views

Windows Defender — 100% Disk Usage

I have recently upgraded my laptop from Windows 7 to Windows 8, and now 8.1. After the upgrade I observed a very high disk usage periodically (almost every day), caused by some weird ...
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3answers
17k views

Do I need Norton Internet Security if my Windows 8 machine has Windows Defender? [closed]

I got a new Windows 8 laptop. It comes with Norton Internet Security pre-installed. Do I need this if Windows 8 comes with Windows Defender? Can I safely uninstall Norton Internet Security?
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3answers
711 views

BSOD when running Windows Defender

I have recently installed Windows Phone 8 SDK on my Windows 8 Pro 64bit machine and I've been getting blue screen of death ever since. They show up every time my computer starts to be idle. The error ...
2
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1answer
7k views

Install Windows Defender on Windows Server 2012 [duplicate]

I've been trying to install the Microsoft anti-virus but Microsoft Security Essentials does not work and I can't find Defender to install. From what I know you CAN NOT use Microsoft Security ...
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1answer
206 views

Windows defender thread using 100% CPU

The problem is the following - a thread of windows defender hangs and consumes 100% of one core (viewed with process explorer). It happens only when there is InPrivate IE instance running. The result ...
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1answer
129 views

How can I hide Windows Defender alerts on Windows 8?

Is it possible to disable the visual alerts of Windows Defender on Windows 8 but still leave the program activated? If so, how?
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1answer
419 views

add windows defender service exception for internet radio

I'm streaming internet radio from here: http://www.protonradio.com/player/live/player.php and windows defender service is running pretty hard inspecting the stream as it comes in. I trust the ...
2
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2answers
8k views

Change Windows Defender Settings Via Registry - Windows 8

I would like to change some Windows Defender settings via the registry, after a clean install of Windows 8, now I know of the DisableAntiSpyware registry value, but I would appreciate if someone could ...
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2answers
2k views

Uninstall Pre-installed Norton Internet Security, And Enable Windows Defender? [closed]

I recently purchased a Windows 8 computer, and Norton Internet Security came preloaded as a trial-ware. Now that the trial is finished, I want to enable Windows defender, and delete Norton Internet ...
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2answers
422 views

What format when excluding processes from Windows Defender?

I find the Windows Defender 'Excluded processes' window confusing. This is the screen I am referring to: I would expect just to enter the name of a process, e.g., devenv.exe, but the Browse button ...
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4answers
3k views

Scheduling silent hourly Windows Defender definition updates using Task Scheduler on Windows 8

I want to update Windows Defender's definitions every hour and came up with the idea of using the Task Scheduler to execute the Defender update service with the signature update argument. ~/Windows ...
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4answers
43k views

How do I install Windows Defender/MSE on Server 2012?

On earlier versions of Windows client and server you could install Microsoft Security Essentials, free antivirus from Microsoft. In Windows 8 client, it is integrated into Windows Defender. However, I ...
2
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1answer
511 views

'Canonical' way to block websites in Windows 8 without using hosts

In Windows 8, Microsoft has (rightly) decided that Windows Defender will prevent modifications from being made to the %WINDOWS%/System32/Drivers/etc/hosts file. This is an attempt to prevent trojans ...
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1answer
2k views

Do I need another anti-virus other than Defender? [duplicate]

Possible Duplicate: Does Windows 8 require any sort of Virus protection? Jut got new laptop with win8 - the question is if I need some extra AV than windows 8 defender? On my PC with win7 I ...
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3answers
3k views

How can I run Windows Defender while running a second anti-virus in Windows 8?

I want to run a Windows Defender scan while running an antivirus scan. In my case I am using Trend Micro OfficeScan Antivirus with Windows 8. Currently Windows 8 will close and disable Windows ...
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0answers
443 views

Windows 8 Action Centre Keeps Reminding Me To Turn Virus Protection On

I have not installed any anti-virus software on my Windows 8 as I think that Windows Defender is enough to keep my system protected from any virus attack. However, sometimes my Action Center shows to ...
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1answer
4k views

How to edit hosts file in Windows 8? Defender says malware detected

I've tried editing it in the same way as in Windows 7. E.g. opening Notepad/Notepad++ as Administrator and then opening the file and save it. Right after saving it Windows Defender will say Malware ...
5
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5answers
4k views

Does Windows Defender update if Windows Update is set to manual?

It looks like the Windows Defender in Windows 8 won't upgrade the signatures automatically, if Windows Update is set to "Notify, but don't install the upgrades". Is my impression real? Is there is a ...
0
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0answers
29 views

How do I virus scan an individual file under Windows 8? [duplicate]

Possible Duplicate: How to add the Windows defender into Windows Explorer’s right click menu to scan a particular drive/folder/file on demand? From what I understand, Windows 8's version of ...
4
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4answers
8k views

Windows Defender high CPU when idle

I noticed on my MacBook Pro from 2011 with Windows 8 that the fans start spinning when I leave my laptop idle for a while. I figured that it is Windows Defender which seems to be running. Is it ...
5
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1answer
2k views

How can I schedule scans in the Windows 8 Windows Defender?

In the previous Windows versions (XP, Vista and 7), Windows Defender included the option to schedule when Windows Defender scans your computer. However, Windows Defender on Windows 8 doesn't seem to ...
6
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5answers
6k views

No Microsoft Security Essentials for Windows 8. So, how to access similar Defender features/settings?

I just installed Windows 8 Pro. One of the first things I went to do is install Microsoft Security Essentials, thinking I still needed add-on security software, but I've learned here that it isn't ...
32
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4answers
115k views

Disabling Microsoft Antimalware service

I can't disable Microsoft Antimalware service (MsMpSvc/MsMpEng.exe). I tried using services.msc, but the startup type is grayed out and I can't change it to disabled nor stop the service. I also tried ...
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3answers
11k views

How to add the Windows defender into Windows Explorer's right click menu to scan a particular drive/folder/file on demand in Windows 8?

There is no option in Windows Explorer to scan a particular drive (or file) on demand by right clicking on it in Windows Explorer as we had in Windows 7 with Microsoft Security Essentials or like ...
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2answers
11k views

Windows Defender vs. Security Essentials in Windows 8

What is the difference between Windows Defender on Windows 8 and Microsoft Security Essentials? They practically look alike, so is there a need to install Security Essentials?
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3answers
5k views

How can you scan from the command line with Windows Defender?

I'm trying to run a Windows Defender scan from the command line. According to the article I found here I should be able to run the following: "C:\program files\windows defender\mpcmdrun.exe" -scan 0 ...