(Going to post/edit in burst so that i don't loose a load again)
I downloaded a file on friday that I suspect to have been a virus.
Since then my Explorer.exe file has been playing havok with the rest of my system.
It would crash and freeze my computer when I entered certain directories via Explorer, then show in TaskManager that there were two versons of the program
I used MG config to disable two startup items. one called b.exe and another that had no name.
I also disabled Rundll32.exe because its command line looked strange and i was told that it wasn't NEEDED.
that allowed me to enter the files but my computer continued to freeze at random times.
using Procexp (Process explorer) I found that the C:\WINDOWS\Explorer.exe was unable to be verified so i took the Explorer.exe from a computer that i knew was uninfected and put it into a read-only folder called SAFE.
With this explorer.exe running I went to delete C:\WINDOWS\Explorer.exe but after i did so, Winlogon.exe flared in CPU usage (at 13-15%).
I did the same for that file but it is still playing up so i have given up trying it on my own but don't want to download any more files without an expert telling me what to do.