Hello all-- I recently solved a driver problem that wasn't allowing me to play a game (FlightSim X Demo), only to find another problem. After install, the game actually let me fly--once-- then I started getting popup errors that Delayed write to C:\Mft failed. When I restarted the computer, it went through all the CHKDSK stuff to fix problem files, which also uninstalled the game. Error messages went away but resumed after I tried installing the game again. So I did some online checking--Windows knowledge base says this can occur with lots of big files being copied, large hard drives (>100GB), and RAID arrays. It recommended increasing the PageFile size so the page file won't run out of room with large/big file transfers, but mine was already set to the recommended setting of FFFFFFFF. Which brings me to my current issue: The other recommendation was to disable write-behind caching. I tried this, but the options on the relevant window of the Control Panel are all greyed out. So I can "see" the option I need to change but Windows won't let me change it. Does anyone know how I can tell Windows to let me change this so that write-behind caching is disabled? Is there a setting in the registry I can modify? I have a RAID array, two 160GB SATA drives in mirror mode. Would this be preventing me from making the change? (i.e. is the RAID driver taking control of this feature away from me?) Would doing a repair install of Windows be helpful? I'd hate to go through all that if it won't. Thanks much!