Infected computer, but antivirus won't detect anything

Here is a list of issues in order of appearance:

1)Browser windows popped open and shut for 30 seconds
2)While typing letters on keyboard many letters would appear (ex. When I type "T" "tvsod" appears.
3)When using google maps for directions, it malfunctioned
4) Mouse stopped working, the computer would not recognize it
5) Mozilla Firefox desktop icon appears in whitebox format, not the normal graphic version

I have tried 3 scanners (AVG, Avira, and Kespersky), none of them detect anything. Any ideas?

Recently my C drive memory has been eaten up but I haven't downloaded any programs. It went from 600 mb to around 200 and kept dropping but I was only browsing the internet. And I have overall slow performance.

 

Have you tried scanning with Malwarebytes antimalware?

http://www.malwarebytes.org/

 

also try MSE, it works well.

 

u shuld try a scan with Hitman Pro, it takes only a few minutes and will catch most malware if its active

 

Howdy zingzing1234,

welcome to Wilders

I suggest you ask for help on one of the sites mentioned in this post: https://www.wilderssecurity.com/showthread.php?t=42148

<S>

 

You might want to try one of the bootable rescue CDs from Avira or F-Secure to clean your computer. They both have the ability to update their virus definitions from the internet.

I also have a friend that had good luck using ComboFix to clean a system.

I personally would try the boot CD option first so that you are scanning without having any potential malware active during the scan.

 

Have you considered that it may not be malware?

What about a hardware issue? Are cooling fans all verified as working? Have you checked the HDD for corruption or file system inconsistencies? Aside from things "unexpected", are there any symptoms that point to unambiguously to malware (unknown processes, extensive and unexpected I/O, etc.)?

Blue

 

That's a good point. I would also do a memory test with Memtest86+. I've seen some weird behavior in the past that was due to a faulty DIMM. Nothing like the symptoms you've described though. My issues were lockups and blue screens. It's a pretty quick check though. I hope you have a clean system to burn a few virus scanning and diagnostic CDs.

 

that was my 1st thought as well!

 

Maybe he is now the proud owner of a brick.
I remember a virus that filled the HDD a few bytes at a time until the system was locked up.
I wonder if he checked the Error logs, assuming it's windows.

 

I'm rather new to this forum so factor that in to what I say, but it sounds to me like you need to do an offline scan first. The following might help.
You will need a clean computer to create the bootable disk, and you'll need an XP SP2 disk. It will take a couple of hours (at best) to create, and you will have to remove some plugins from ubcd4win or use a dvd.He suggests using SP3 because he found he required it (I didn't).
The advantage is that this should do a decent job of identifying malware and quarantining it. He doesn't cover rootkits, but at least one of the 3 tools he runs has an option for it, he just doesn't turn it on in his howto videos, because I think he knows what he is looking for. With this disk you will also have some utilities at hand to do some of the hardware checking others have suggested, like mem tests, checking your disks for errors (chkdsk type stuff) and other diagnostics.

http://remove-malware.com/how-to/how-to-build-a-bootable-anti-malware-disc-videos/

oh, also it is free.

 

Once the pest gets on the system it first task is to disable your AV protection. Sounds like you got a pest on the system. GMER or SmithFraudFix would be needed to be on your desktop and then run them in Safemode to remove your threat.