After a full installation of winnt and all accompanying software, including a touch screen driver, A drive (3.5) gets corrupted somehow and will not access disk in drive. Keeps giving incorrect parameter error. No idea what causes it to happen. Once it starts, the only solution so far is to re-install winnt 4.0. Drive is not accessible in dos, nor will it format the disk. The boot-up process does recognize the drive, only NT does not and gives parameter error. Drive will initially work fine until after several other programs are installed. Any suggestions?