use, msconfig on execute,
windows + R
type: msconfig.
goi to start programs, if u dont know any programs of there better dont do anything. but if u know the programs when ur pc start, the / remove it from the programs, just the unknown, after restart ur pc.
delete all programs unkown it and use a nice antivirus
try to get 1 cd of ur windows, to fix it the deleted files by the virus

if after that ur pc still bad.
FORMAT ALL OF UR PC
