Software for protecting against, detecting, and removing viruses, malware, and other potential threats to a computer system.

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318
votes
18answers
250k views

How can I remove malicious spyware, malware, adware, viruses, trojans or rootkits from my PC?

What should I do if my Windows computer seems to be infected with a virus or malware? What are the symptoms of an infection? What should I do after noticing an infection? What can I do to get rid of ...
59
votes
6answers
4k views

Is there a point in installing antivirus on Ubuntu?

I have recently started using Ubuntu. I am wondering about the point of installing antivirus programs on Ubuntu. On SuperUser, I found the opinion that it only detects "windows viruses" and removes ...
52
votes
5answers
3k views

How do anti-viruses work?

So I was thinking about viruses recently, and wondering how exactly antiviruses keep up? Considering anybody who'd been coding for a few weeks could hack together something do do nasty, nasty things ...
30
votes
2answers
27k views

Does Microsoft Security Essentials replace Windows Defender?

Does Microsoft Security Essentials replace Windows Defender?
27
votes
4answers
33k views

Is my host machine completely isolated from a virus-infected virtual machine?

If I am running a Windows 7 virtual machine on a Windows 7 host using VMWare or VirtualBox (or anything else) and the virtual machine is completely overloaded with viruses and other malicious ...
24
votes
2answers
4k views

Found new malware not detected by antivirus. How to evaluate the threat?

On a Windows 7 workstation running an up to date antivirus suite (Kaspersky) I found several suspicious processes. To look at the process activity I used the excellent ProcessMonitor from ...
24
votes
1answer
9k views

What does Firefox do when “scanning for viruses” after download?

Never mind the fact that Firefox is a browser and not a AV tool, but what exactly does it do after a download? Even on systems that have an up-to-date AV this generates a pause of several seconds ...
19
votes
6answers
1k views

Should I worry about malware on Linux? [closed]

I don't run an antivirus on Linux ( most people I don't AFAIK ) and I'm not at all concerned about any form of malware or spyware or any other_bad_ware. Should I by concerned? Of course I don't ...
14
votes
3answers
8k views

How to be certain you don't have a virus when anti-virus scanners find nothing malicious? (Windows 7)

I recently spent many hours troubleshooting a laptop that could not connect to the internet. The laptop exhibited no other unnatural behavior, and so my first thoughts were to try connecting to other ...
12
votes
6answers
6k views

Does the Virtual PC XP Mode need safety measures?

Does the Virtual PC XP-Mode (or any other virtualized mode) require safety measures, such as antivirus or a firewall? I'm just wondering if the XP-Mode would be a large security loophole, since it's ...
11
votes
8answers
1k views

Is Anti Virus Software needed for a Mac (OS X); If so free solution? [closed]

I have a MacBook that I use for programming and graduate school work. Since I bought it, I've not given much thought to putting an anti virus on it. I bought it about 6 months ago and for some reason, ...
11
votes
3answers
526 views

Does an antivirus also scan for viruses targetting other OSes other than the one it runs on?

Today my company has some external support personnels coming over and 1 of them bought a thumb drive containing the files for the fix to the driver problems. The IT manager of my company requested ...
11
votes
4answers
869 views

How do I explain how Anti-Virus protection works to a non-Super User?

I found this question which expalins a little in detail of how Anti-Virus softwares work exactly. But I just had a client ask me this, and I really couldn't give him a good, simple, easy to understand ...
11
votes
4answers
4k views

Recommended offline on-demand virus scanners

I have never run full anti-virus on my Windows XP systems. Instead I use various anti-malware tools to manually perform scans every few weeks. This approach, combined with Windows updates and ...
11
votes
1answer
41k views

How to disable/enable Microsoft Security Essentials from the command line?

I would like to know how to disable and enable Microsoft Security Essentials from the command line. This is a common procedure on build machines in order to speed-up the build process.
10
votes
6answers
45k views

Windows Home Server anti-virus recommendations [closed]

Have just got myself a new Windows Home Server (a Tranquil PC model) and loving lots of the features, but I can't help feeling that with all of my valuable data concentrated in one place, it's ...
9
votes
9answers
3k views

Antivirus software that doesn't run in the background

Is there such a thing antivirus that doesn't run in the background? Every antivirus I have tried runs in the background even if I stop protection, quit, or etc; there still are drivers/services of the ...
9
votes
4answers
17k views

How does the performance of Microsoft Security Essentials compare with other Anti-virus products [closed]

Are there any solid data (i.e. benchmarks) comparing the performance of Windows Security Essentials with other anti-virus products? In particular, I'm interested in how much overhead it imposes on a ...
9
votes
1answer
25k views

Is there a way to disable MsMpEng.exe from monitoring file access during parallel computing operations? [duplicate]

I am using Windows 7 and have a 4-core Intel CPU, and was recently running a 4-kernel parallel computation written in Wolfram Mathematica that accesses a directory on an external hard drive containing ...
9
votes
2answers
2k views

What's the difference between “anti-virus”, “anti-malware” and “anti-spyware” tools?

Many products (such as Norton or McAfee) advertise as "anti-virus" tools or suites, while others advertise as "anti-malware" (like Malwarebytes), and even more as "anti-spyware" (Spybot S&D). Are ...
9
votes
2answers
1k views

Why do scan results of hacked/hacker applications always indicate infection? [closed]

Whenever I scan a patch, keygen or a hacked application (using an online scanner service which scans with 20+ different antivirus software) the results always say that the file is infected. Do hackers ...
9
votes
5answers
185 views

How can I make my OS appear as if it is running virtualized?

A lot of malware these days is able to detect when it is running virtualized under VMWare, VirtualPC, WINE, or even in a sandbox such as Anubis or CWSandBox. This essentially means that malware will ...
8
votes
2answers
659 views

What happens if you install an antivirus program with another already installed? [duplicate]

Antivirus software always warns that any other antivirus currently installed should be uninstalled to avoid serious problems. From what I understand, one program may see another AV as a potential ...
8
votes
2answers
4k views

What is the difference between - Windows Defender and Microsoft Security Essentials?

What is the difference between - Windows Defender and Microsoft Security Essentials? Should I run both?
8
votes
3answers
5k views

Does Windows 8 require any sort of Virus protection? [closed]

I have read about how Windows 8 is better and has better built in security... So the question is, do I really need third party Virus protection, or is the built in security good enough?
8
votes
3answers
434 views

How to Benchmark an AntiVirus Software

We just installed Windows 7 in our brand new PC that we build ourselves. There are heaps of antivirus software out there, avast, panda, avg, etc. We would like to balance between speed and security. ...
8
votes
2answers
548 views

Can I fool Windows into thinking a virus scanner is installed?

I'm trying to allow programmatic access to Outlook without getting an annoying popup. This is configurable under Tools -> Trust Center, however my outlook warns Antivirus Status: Invalid. Which ...
8
votes
1answer
2k views

Avast Antivirus downloading data from net even when told not to update

This is a strange problem that I have never seen before. I have two machines, both running Win 7 and running the latest version of Avast, both seem to be downloading large amounts of data. I noticed ...
8
votes
8answers
28k views

How to copy Kaspersky 2013 virus definitions update to another computer?

I have 5 computers and installed the same anti-virus (Kaspersky Internet Security 2013) on all of them. Now I want to update the anti-virus on the computers. Since my bandwidth and time are limited, I ...
7
votes
4answers
424 views

Is there any 64-bit software for Windows that is much preferable to its 32-bit counterpart in a 64-bit OS?

I was searching for a free 64-bit antivirus, since I read somewhere here on SU that its much better for 64-bit systems than the 32-bit version, I have only found 32-bit versions with 64-bit OS ...
7
votes
5answers
516 views

Is virus protection neccesary with unprivileged users?

If an user does not have admin privileges or privileges to edit the registry, is there any reason to have antivirus software installed?
7
votes
1answer
4k views

How to report a malicious site to Google, Microsoft, Mozilla, etc. so that they will warn users [closed]

I completed a project a year ago. Now a few modification were needed. While trying to test the site, there was an index.html file with a malicious script which had an iframe to another site's jar ...
7
votes
5answers
4k views

How to disable Kaspersky Antivirus javascript injection?

Since the installation of Kaspersky AntiVirus 2016 every website I visit contains this line in <head>: <script type="text/javascript" ...
7
votes
2answers
3k views

How to scan and detect spying software

I have a friend who caught his landlord in his apartment using his laptop (he moved out afterward). The next time he tried to log in, his password was changed. I fixed the password problem but I got ...
7
votes
4answers
15k views

Windows 7 says Avast is off, but it's not! Am I infected?

I have Avast Free antivirus installed on Windows 7. I just noticed that Windows Action Center (the white flag icon in task bar) warns me about activating Avast antivirus, and even if I click activate ...
7
votes
6answers
17k views

Is there way to scan a registry hive on an attached USB drive?

I have a hard drive with a virus that I removed from a PC. I can scan the file system of it as an attached USB drive. But how do I scan the registry of that USB drive since it is not booted up like ...
7
votes
2answers
6k views

Prevent exe execution from temp internet folder

how can i prevent exe excution from temp and internet temp folder. we have antivirus deployed but it does not prevent exe execution from temp folder. I have tried prog trust-no-exe ...
7
votes
2answers
266 views

What should I look for in an antivirus program?

I've never really bothered with antivirus software or firewalls before, and it's never been a problem, but since I just invested in a nice new Windows box, I figured I'd get some extra protection. ...
7
votes
3answers
2k views

Is Windows Firewall / Antivirus good? [closed]

I was wondering if I should let Windows Firewall and Antivirus take care of my system's health. Should I consider buying a paid version of another antivirus/firewall (Norton, AVG)?
6
votes
6answers
3k views

Clean up infected computer from viruses [duplicate]

Possible Duplicate: What to do if my computer is infected by a virus or a malware? I have a computer which had AVG Free installed from day one. After several months of operation, it starts ...
6
votes
5answers
3k views

How can I test my virus scanner?

How can I test several anti-virus programs to determine which performs the best, so that I can writing reviews? Where can I find viruses for tests?
6
votes
4answers
818 views

Would my virus scanner be able to scan multiple files concurrently with dual CPU instead of multi-core?

Anti-virus: Microsoft Security Essentials OS : Windows 7 x64 Silly question perhaps, but somehow I was under the impression that multiple cores would mean the anti-virus scanner would be ...
6
votes
1answer
451 views

Antivirus in Windows 8

I have been using Windows 8 for a while, and I have just remembered that I did not install any antivirus software. To my surprise, I don't think Windows 8 has ever shown any of the usual nag popups ...
6
votes
2answers
127 views

trying to get antivirus policy changed

I am a radiologist who spends all day taxing my computer with thousands of medical images and heavy duty image processing. Unfortunately, my hospital, and many like it, apply the same antivirus policy ...
6
votes
6answers
8k views

How to keep Windows 7 from sleeping while scanning the PC

So, I've been using Microsoft Security Essentials lately. And it usually takes a couple hours or more for it to full scan my hard drive. Because of that, I commonly leave it scanning while I go do ...
6
votes
1answer
245 views

Does it make any sense to install anti-virus on Windows XP Mode? [duplicate]

This is almost certainly a dumb question, but... say I have Windows 7, with some anti-virus software installed, and I am using Microsoft's Windows XP Mode to run some legacy applications as well. Is ...
6
votes
4answers
52k 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) ...
5
votes
12answers
3k views

Lightweight virus scan for win XP [closed]

I have an older machine (athlon 1500+, 1.5Gb RAM) running XP on which I not currently running an on access virus scanner. I do scheduled scans with clamwin and malware bytes. I would like to find a ...
5
votes
6answers
8k views

Rock-solid hardening of a Windows 7 system?

I am historically a Linux guy, and only use Windows when I absolutely have to via VM. However, I recently purchased a new rig so that I can keep a dedicated Windows 7 machine up for hard work ...
5
votes
3answers
5k views

Should I run an antivirus in a Windows Server? [closed]

Should I run an antivirus in a publicly-facing Windows Server? If so, which one would be the best for that situation?