i recently downloaded vista rc1 and installed it on my desktop. the installation went very well and it runs beautifully, for about five minutes that is. after this length of time,it completely slows up and then locks out.as soon as i'm logged in,windows tells me thatit cannot find SIS RAID driver. i installed thevista os over xp as an upgrade, my system has 3.0gz processor, 1gb ram andits generally pretty high spec. i cannot understand the reason for it locking so early, any thoughts? regards