>>>It looks like it might be some sort of malware - search Google on "_eac_qt_" (especially 2nd page of results).
>>>
>>>Also, you can search your computer's registry for that string and see if it appears in any suspicious places e.g. HKLM/Software/Microsoft/Windows/Current Version/Run
>>>
>>>Do you run antivirus software? If not free scans and/or free trials are offered by Trend Micro and Symantec, among others.
>>>
>>>You may also want to download and install antispyware software such as Ad-Aware and Spybot Search & Destroy. If you're going to do this, install, update and run both of them.
>>
>>I found only one entry in the registry
>>HKEY_USERS\S-1-5-21-3433477010-1634314524-1101381461-1003\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\._eac_qt_
>
>Since it looks like it could be Virtumonde/vundo you may want to read this:
>
>http://www.bleepingcomputer.com/forums/topic18610.html
>

I tried it, it didn't find an infection.

>Hijackthis is available here:
>
>http://www.spywareinfo.com/~merijn/programs.php
>

Should I run it?

>Some free scanners:
>http://housecall.trendmicro.com/
>http://security.symantec.com
>http://www.kaspersky.com/virusscanner
>
>And of course run the one you already have.
>
>After you have cleaned off what you can, If you do not know how to read a hijackthis log you can post it and I will try to take a crack at it. It might take me a while.
>
>I don't know how much experience you have with these things so the above may be too much or too little instructions.

I have avast, I'm going to run it.