Windows Trojan

[Freeforall]

My PC has recently been infected with a nasty trojan. It is probably 'Trojan Generic KDV 792778' according to some websites. It raises CPU usage to 100% and overheats the computer. When you open task manager, it hides itself so you cannot see it. If you close task manager, it starts up right away. I have managed to delete it about 4 times, and the CPU usage goes away for a while, but after a couple of restarts, it manages to come back again. I am stumped... I haven't had a stable internet connection in about a month, so I don't see how it could redownload itself.

It disguises itself as SearchIndexer service. It is running through igfxupdate.exe. I found this file in the following places:

C:\%windir%\System32
C:\%windir%\SysWOW64
C:\%windir%\SysWOW64\update

I deleted all of the files listed in those locations. Next, I went to the services manager and disabled the 'SearchIndexer' service.
Then, as administrator, I opened the Command Prompt and typed 'sc delete searchindexer'. It says it succeeded in deleting it, and it has. The problem stops for a while, but after a reboot or two, it always comes back.

I read somewhere that it might have something to do with the 'C:\Windows\SoftwareDistribution' folder, but I wasn't sure, so I didn't delete it.
It is getting ridiculously annoying, and if anyone would be willing to help, or if you have also been infected with this nasty bugger, I would really appreciate it.

[Chaos]

If you haven't tried it yet, go download and run Malwarebytes.  It's just about one of the the best malware removal programs I have ever used, and it's completely free.

[Freeforall]

If you haven't tried it yet, go download and run Malwarebytes.  It's just about one of the the best malware removal programs I have ever used, and it's completely free.

I completely forgot to mention, I have scanned with Avast and Malwarebytes a couple of times, and they haven't picked up anything.

[KaptainKohl]

damn i think i might have this too, i thought it was weird that my computer was randomly heating up yesterday and today.
i checked for the  SearchIndexer and its is in all three of those locations you said and they were ether created/modified yesterday (the 9th) at 11:13 when i stared noticing my computer be weird.\
hopefully this is just a weird fluke and i don't have it but i would like to be sure. :/

[Freeforall]

damn i think i might have this too, i thought it was weird that my computer was randomly heating up yesterday and today.
i checked for the  SearchIndexer and its is in all three of those locations you said and they were ether created/modified yesterday (the 9th) at 11:13 when i stared noticing my computer be weird.\
hopefully this is just a weird fluke and i don't have it but i would like to be sure. :/

Hmmm... did you recently download Black Ops II? I believe it may have been the cause of my infection...

[KaptainKohl]

Hmmm... did you recently download Black Ops II? I believe it may have been the cause of my infection...

no. i don't remember downloading anything yesterday to my computer i'll check my download history

[Torch]

Hmmm... did you recently download Black Ops II? I believe it may have been the cause of my infection...

no. i don't remember downloading anything yesterday to my computer i'll check my download history

You did not download Black Ops II.

@FFA: That's always a risk with torrenting : /

[ARTgames]

I would format and reinstall. Better than playing wack a trojan and would take less time too.

[Freeforall]

I would format and reinstall. Better than playing wack a trojan and would take less time too.

It hasn't attacked again today, but if it does, I won't hesitate.

[sly 3 4 me]

It's a risk to just have it running. If I were to make a virus I'd go for one that was non-intrusive and then just steal all the data without them noticing. It's not really a case of an 'attack'. It's always there. I'd suggest a reformat. I can help if needed.

[Hikarikuen]

Reformatting is good to do periodically anyway, but if for some reason you don't want to yet you could always try burning a boot disk with a malware removal program on it and scan from that. I've always been a big fan of Hiren's Boot CD.