Can you enable 'show hidden files '
http://www.bleepingcomputer.com/tutorials/tutorial62.html#winxpThen locate
mswsock32.dllin c:\windows\system32\mswsock32.dll,
twext.exe in C:\WINDOWS\system32\twext.exe
IMJPMIG.EXE in C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE
ImScInst.exe in C:\WINDOWS\system32\IME\PINTLGNT\ImScInst.exe
TINTSETP.EXE in C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE
I know the last three could be related to some asian translation aid, but they have cropped up before, unexplained
Send those files to Virustotal and if you cannot copy/paste, post the URL from the address bar
http://www.virustotal.com/ Have you recently removed other serious malware ?
One last thing, are you running AVG as well as Avast, this is a bad idea