So back in the day I setup my 120GB SSD as a Cache Drive (20GB) and OS (100GB). This required the BIOS setup as RAID obviously. Since then I've given up on the caching and now have an Intel 240GB SSD Drive where I restored my OS. I want to change the bios to AHCI, but when I do this I can't boot. I've tried just about everything. a. Removed Intel Drivers (can't remove them entirely or It won't boot) b. Change bios setting to enable AHCI c. Updated Registry to enable AHCI driver at startup d. NOTHING WORKS!!! Has anyone successfully done this successfully without re installing?