Hello. I just built a new computer with a Biostar NF4 SLI Mobo, a MSI ATI X800XL, 2x512 Mushkin Ram, 80 GB SATA Samsung HDD. Computer had a lot of difficulty after a fresh reformat and install of windows. Lots of difficulty with drivers, for example, mouse fails to work occasionally after boot. The main problem I am experiencing is the Videocard fails to take any catalyst drivers. After an install of the latest drivers, I get a CLI.exe error, and the catalyst control center fails to load (which it should load every windows boot) Windows is up to date. The error is as follows: CLI.exe - Application error: The application failed to initialize properly (0xc0000135). Click on OK to terminate the application. Any suggestions? I am wondering about compatibility between this particular motherboard and the video card. Thanks in advance. EDIT: Ran DXDIAG. According to direct x, I am running an x800gto. Should it say x800xl? Is it possible a prior owner (this is a possibly refurb. ebay purchase) flashed the card wrong? Any suggestions? Thanks.