A software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer.

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344
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18answers
265k 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 ...
98
votes
23answers
15k views

How can I make a Windows PC bullet-proof for home users? [closed]

I realize that virus-proof on a Windows PC is far fetched, but in the interest of keeping time spent as the "family-tech-support" to a minimum, I am looking for ideas to lock a computer down to the ...
34
votes
4answers
42k 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 software,...
93
votes
15answers
67k views

Can AVI files contain a virus?

I'm downloading an AVI file via a torrent, but my anti-virus detects something. Is it possible that the AVI file contains a virus? It is quite weird since the torrent has many positive reviews.
37
votes
7answers
49k views

Can a virus from a VirtualBox VM affect the host computer?

Can a virus from a VirtualBox VM affect the host computer?
16
votes
5answers
17k views

Unreasonable RAM usage in Windows 7

I have a fresh install of Windows 7, and my RAM in normal startup goes up to 2.5GB. I looked at Task Manager, and there's at least 1.5GB missing from there and in Resource Monitor as well. There's no ...
1
vote
3answers
1k views

Excel,word,pdf files got encrypted by ransomware

My MS Office files and pdf files has been encrypted by some ransomware in my pc which was running window XP. I removed the ransomware,formated the OS and put windows 7, but my files are still ...
22
votes
8answers
12k views

Virtual Machine and Virus

I have a requirement for which I have to get online without protection (firewall, anti-virus). At the same time, I don't want to risk getting infected with viruses. If I install a virtual machine (...
14
votes
8answers
10k views

Can a virus melt the CPU?

I was just wondering if a virus could melt a CPU by altering te voltage in the bios. :) (and no, I'm not planning on making that kind of a virus...)
9
votes
3answers
13k views

How to determine what is running in DLLHOST.EXE that's missing /ProcessID switch?

I have multiple dllhost.exe processes running on my computer: Every one of these image's command line is missing (what I am thinking is) the requisite /ProcessID:{000000000-0000-0000-0000-...
4
votes
9answers
2k views

Virus protection for flash drives

At school, there is a large network with lots of non-technical minded people and lots of viruses. How can I protect my flash drive from these worms and viruses so I don't bring them home and infect my ...
9
votes
9answers
8k views

UAC being turned off once a day on Windows 7

I have strange problem on my HP laptop. This began to happen recently. Whenever I start my machine, Windows 7 Action Center displays the following warning: You need to restart your computer for ...
12
votes
4answers
16k views

A virusproof (ransomware…) strategy for backup on a NAS?

I bought a NAS to share files and as backup solution. Recently my netbook got infected by a ransomware. All files on the netbook and most of the file on the NAS were destroyed (the virus shuffles the ...
7
votes
3answers
8k views

Can a Virus Enter via Ubuntu and affect Windows in dual boot?

I have a Windows XP Pro dual booting with Ubuntu Jaunty Jackelope on a single hard drive. On Windows XP I have a Eset NOD 32 while on Ubuntu I have no antivirus installed. While working on the ...
3
votes
4answers
850 views

Virus / Malware: Explorer window with strange user logged into Hotmail [duplicate]

Possible Duplicate: What to do if my computer is infected by a virus or a malware? I was looking into a PC, the user of which had complained that he couldn't connect to the internet and that ...
6
votes
2answers
4k views

How can I recursively clear the “Hidden” file flag on Windows Vista?

A friend's computer was recently infected with a virus. I hope the virus has been removed successfully. But, it appears that the virus set the "Hidden" flag on most directories and files on the ...
5
votes
2answers
2k views

All folders in all drives are set to read only on Windows XP and can't be changed

I am using windows XP and all of my folders on all drives are now read only. When I remove the read only check, it gets set back to read only. Why? I cannot write any file from my flex application. ...
59
votes
7answers
21k views

My webcam just came on “out of the blue”

I have a Microsoft LifeCam HD sitting atop my monitor. Today, completely out of the blue, its light came on -- I was simply browsing the web (in Chrome) when it happened. After about 5 minutes the ...
16
votes
5answers
14k views

Why can I get a virus or trojan from visiting a website?

I have seen these a lot lately. You click the link, and instant trojan. No need to download or anything. How is this possible? Is there a way I can scan the links before visiting to make sure I won'...
7
votes
5answers
14k views

Is it possible to detect a virus with taskmanager?

If I would have a running virus on my system, would I be able to see the process in taskmanager? I mean, would it be possible for a running virus to circumvent the taskmanager so the process doesn't ...
1
vote
4answers
13k views

How do I clean up virus induced hidden files and disabled everything?

I'm working on a Windows XP computer that had the unfortunate experience of being infected by mal-ware that pretty much disabled everything. I was able to clean the computer using a combination of ...
14
votes
1answer
720 views

Why shouldn't we open an image in an email?

Most email clients do not display an image by default in the content of an email. But I don't understand this yet. How can displaying image job attack the computer?
6
votes
6answers
4k 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 ...
2
votes
3answers
32k views

Laptop is asking for password (which I never set), even when without hard-drive

One day my laptop got infected by a virus, and I cleaned all those suspected infected files with Avast! Antivirus. I didn't check what kind of files are cleaned, since there are hundreds of it. Now I ...
1
vote
3answers
445 views

Virus…? Tons of people talking. Not sure where else to ask

I really wasn't sure where to ask this, here, gaming, stack overflow, it can fit into any of them but I'll post it here. Sorry if I'm posting in the wrong area. I was playing Half-Life just now and ...
1
vote
2answers
4k views

Can mp3 file contain a virus? [duplicate]

Possible Duplicate: Can avi files contain a virus? Can mp3 file contain an executable virus? I mean .mp3 files only (not .mp3.exe , not an .exe renamed to .mp3 and smtg like that).
7
votes
3answers
2k views

Can a computer be infected by malware through web browser?

Can a computer be infected when it accesses a malicious web page? Why is not a web browser 100% safe? What web resources, such as Java Script, Flash or a HTTP connection, can infect a computer?
6
votes
1answer
5k views

Is It Possible to Spread Virus Through Online Embedded Video?

I am curious about whether it's possible to embed virus in online video ( in the swf and/or flash format)? Or is it possible to put a virus inside the html5 <video/> tag?
4
votes
5answers
2k views

Is it possible for virus in windows to infect ubuntu?

I have a triple boot, windows 7 , 8 and ubuntu. Is it possible that any spyware or virus in windows will also harm ubuntu or spy during ubuntu session ?
3
votes
7answers
4k views

What to do about counterfeit Windows warning

I have a Dell computer that has just started waring me that Windows XP may be counterfeit, the operating system was pre-installed on the PC by Dell. Can I just ignore/disable the warning, or should I ...
3
votes
2answers
5k views

How to be safe plugging in an infected USB?

I have an infected USB that is loaded with trojans, spywares, Sality, etc. Basically, I wish to put my important data somewhere, reformat the USB, then restore the data. I have prepared a freshly ...
3
votes
1answer
2k views

Is it possible to find the origin of a virus?

Is there any method with which you can determine the origin for a given piece of malware in Windows? One of my PCs was recently infected with the PWS:Win32/Zbot.gen!AP password stealing trojan. Is ...
3
votes
5answers
5k views

I can't open/ping any antivirus sites

I have a problem with a virus in windows 7, I don't know what kind of virus is infected my OS, I installed kasersky antivirus, and clear all detected viruses. After that I can't open any antivirus ...
2
votes
3answers
405 views

IE homepage set to some site I don't know about

Looks like I have some kind of virus on my computer. The default home page for Internet Explorer keeps getting set to some site called socio.fusionace.com Gmail has also been giving me problems in ...
2
votes
3answers
55k views

Files hidden on USB hard disk because of virus, how to clean?

I have 1 GB hard drive with files hidden on it due to a virus. All of its contents were gone after a virus got in when I gave the drive to someone else. After research found that it was a virus may be....
1
vote
1answer
2k views

Got ransomware and Shadow explorer dont work

I got infected by the CTB Locker and probably I have removed the virus itself. But the files all got polluted. I tried to use shadow explorer but it shows all blank in CDEF any drives and got no dates ...
1
vote
4answers
23k views

Prevent Sending Spam with my Yahoo Account?

Today morning I found my Yahoo Mail account sent several emails with Subject re: and this body : this is crazy you should give it a look http://www.wanews15.net/biz/?news=9080205 to all my contact ...
1
vote
2answers
274 views

Folders disappear every time Windows XP starts up

Symptoms: Whenever my Windows XP machine starts up, subfolders disappear from the first top-level folder, listed alphabetically (eg. from "C:\AA Backups"). The first time it happened I suspected user ...
0
votes
2answers
650 views

Do I have a virus? What is this green icon?

Just got a new computer at work and was just starting to install all of my required software on it. I downloaded something and may have installed it by mistake (it could have been TortoiseSVN). ...
0
votes
1answer
304 views

Redirect pop-up to wonderlandsads.com malware for webbrowsers [duplicate]

My PC has been infected with a malware that opens pop-up to some ads, mostly in my native language (Persian) but from (wonderlandads.com), when I click on a link or in an input box in StackExchange ...
33
votes
6answers
7k views

Do all programs running in a computer show up in the processes tab in Task Manager? [duplicate]

The reason I am asking this is because I am curious if there can exist a virus in the computer without me ever being able to know it exists. To be more specific, a virus that emits no signs of any ...
19
votes
4answers
2k views

What are ways to prevent files with the Right-to-Left Override Unicode character in their name (a malware spoofing method) from being written or read?

What are ways to avoid or prevent files with the RLO (Right-to-Left Override) Unicode character in their name (a malware method to spoof filenames) from being written or read in a Windows PC? More ...
11
votes
2answers
67k views

usb flash drive contents replaced with a single shortcut

I was confused when I opened my flash drive all I saw was a shortcut with its target as C:\Windows\system32\rundll32.exe ~$WO.FAT32,_ldr@16 desktop.ini RET TLS " " You may refer to the images I ...
16
votes
6answers
7k views

How can visiting a webpage infect your computer?

My mother's computer recently became infected with some sort of rootkit. It began when she received an email from a close friend asking her to check out some sort of webpage. I never saw it, but my ...
6
votes
3answers
3k views

Unknown linux process with random command

I have a unknown process when I run top: When I kill the process it is coming again with another random name. when I check the rc.d levels and init.d there are many random name similar like this ...
6
votes
3answers
2k views

Worms vs Virus what's the difference? [closed]

I don't understand very well the difference between viruses ans worms, it seems that worms don't need any host to duplicate himself. But somebody can explain it? It means that a worm IS a soft? and ...
15
votes
7answers
42k views

Can system restore remove virus from the computer?

Can a system restore to a past time remove the virus from the computer?
7
votes
1answer
37k views

Files names in pen drive turned into gibberish text

Recently my uncle gave me his memory card from his phone telling me something is wrong with it.When i tried to check the contents of memory card this is what i found(take a look at screenshot). I ...
7
votes
0answers
5k views

How I analyzed svchost high CPU utilization problem [closed]

My machine was attacked by a trojan that manifested itself as a service in the netsvcs svchost process. This process can be identified using Process Explorer as 'svchost -k netsvcs'. The symptoms I ...
7
votes
5answers
6k views

can a virus execute by itself?

is there any type of viruses can execute by itself after download then on the HDD without clicking on it?? if there is ..... can you refer me to any sites about them?