Hi all, uvmain: It cant be corrupt SP2 as i've used this SP2 in the slipstream of all myversions that work and have also independantly used this SP2 (downloaded from Microsoft) on other builds. It is definitely Kosher. LeveL: Yes i got the driverpacks from there. Have also got Ryan's VM Integrator. Have tried various methods like using f6 and original driver from floppy etc as well as slipstreamed version. I know the driverpacks works 100% on all other PCs i've tried (but then again none of them are using this particular RAID driver!!) Zxian, my original post has my chipset etc. Its an onboard (or integrated?) SATA port (1 of 2). I read on the Maxtor site for this particular drive that the Maxtor MAxBlast drivers and utilities will not detect onbaord SATA ports on the KT series motherboards (and they were right for a while til i eventually played with the BIOS and plugged and unplugged it and got it to be seen and formatted) LLXX: I wish i had known about this before i bought the bloomin' SATA drive now. I bought it on the say so of a guy who promised serious performance gains. So far it has only hindered my rebuild by a full month :-( and i might add too, i am getiting loads of lost files and chkdsk starting up all the time and finding orphaned files and i have a "lost+found" folder on every partition indicating chkdsk error fixing Here is what i intend to do. SP2 is basically just a roll up of all the patches from SP1 upwards so i'll start to install these patches "by halfs" (eg if theres 50 patches, i'll install the first 25 and see if it dies - if not then i'll do the next 12 then 6 etc ) until i narrow down what is killing my system. This could take any time from a few days to a couple of decades so wish me luck