all downloads corrupted

all the downloads(.exe) i tried to DL are corrupted mainly the nvidia(geforce 7900GTOC SLI)drivers i ''need''this started happening recently it tells me tht the files are corrupted, to redownload and check integrityi'm runningwindows xp pro (version 2002 SP2)amd athlon(tm) 64X2 Dual core Processor 3600 2.01 GHz, 1GB of ramand recently i've also installed the latest driver for my video card and started to getthe Blue screen and so thts why now i need to revert backall downloads corrupted
I would run antivirus software...all downloads corrupted
get ur pc thoroughly scanned for viruses %26 malwares...might juz do the needful! if aint workin..giv us a buzz!