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WD Internal HD showing as unknown drive
First post on the windows 7 forums. I recently built my own PC from the ground up and everything was running fine for the past month without any problems. I received a windows 7 professional x64 key through my grad school and decided to upgrade my OS (Windows 7 home x64) and shortly after that I encountered issues with my hard drive. Things ran really slow and then my hard drive just stopped booting and in the RAID configuration screen during bootup it shows the drive as an unknown device. I've tried reformatting the drive or just reinstalling windows and in both cases even with my motherboard's driver disc in, it can't seem to find a driver to read the HD. My system build: CPU: Intel i5 2500k w/ stock fan Motherboard: Gigabyte GA-Z68XP-UD3-iSSD RAM: CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Video card: ATI HD Radeon 6870 1GB 256-bit DDR5 PCI Express 2.1 x16 PSU:CORSAIR Enthusiast Series TX650 V2 650W Hard Drives: Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM SATA 6.0Gb/s Intel 20gb onboard SSD Case: NZXT Phantom I've tried searching for fixes to this issue on google and on WD site, but I've never encountered a problem like this before and could appreciate the help. Thanks.