IMHO, your friend did you a disservice; striping is for people who know a lot about it and how to recover from the messes it can cause. Also, striping and updates are separate things, so I am somewhat confused about how updating is part of striping.
Having gotten that off my chest, can you provide some details?
Was this done to an existing Win7 installation, a brand new build with no OS on it, or as part of a re-installation?
Was the striping done with the Windows 7 installation procedure, in the BIOS ("in hardware"), or in Disk Management in an already-running OS?
I almost always let updates run while I am working on other things - the only thing you shouldn't try, IMHO, is software installations. Are you having problems accessing the data on your drive?