I think i may be infected with a Rootkit virus and maybe even more. Here's the story. On Monday, Avast notified me that I was infected. Occasionally, when I opened Firefox, a fake Internet Explorer with Firefox's icon appeared along with it. The page never loaded, but it was regarded as a security risk. Also, I had a USB drive connected and an error came up saying that there was a problem with the file K: and it corrupted various files in it.
I went ahead and deleted some of the malicious DLLs that were placed in my system32 folder. Now when I start up the computer, three error messages pop up reminding me that those DLLs are not found.
For a while, the browser stuff stopped. Then I encountered a file in system32 that constantly regenerated itself. They were named "trzXXX.tmp" where XXX is a value that numbers the file. I took it out of the folder and disposed of it. Again, nothing happened for a while. But then today, another one showed up in there. A DLL appeared and I tried to delete it, but it didn't let me, then it disappeared and it left more trz.tmp files.
So far, everything seems okay, but I heard about these Hijackthis logs and so I got one to see if I could get help.
I've attached the log file. I hope someone can solve this problem before things get worse.