Can't install or execute antiviruses

[Nistenf]

Hello.
I had the wintems.exe virus, and I deleted it and the windows/system32/drivers/down foler and it's gone, it doesn't seem to be executing.
But I can't still use any antivirus software, they give me errors like "%1 is not a win32 valid aplication", and most don't even install.
I'm here asking for your help, so thanks in advance :)

[Nistenf]

By the way, I'm leaving my home tomorrow, and I'll come back one week later. How can we do for this thread not to be archieved or something similar?