Windows 7 64bit Asus P7P55D-E LX 8GB Crucial SDR DD3 EVGA GTX 260 Samsung 470 SSD 128gb (Startup Disc) Seagate 2TB WD 2TB <--- Problem Drive WD Velocirator 300GB LaCie 2TB external connected with eSata Last night i installed a new Bootup disk drive (128gb ssd). The PC started up fine with most of the hard drives plugged in (via sata 2). I plugged in the last drive, which was the WB 2TB. During bootup, the computer started normally. It showed the bios started up and showed a screen detecting the external. Just prior to the windows welcome screen the boot stopped. Only a cursor in the top left Hand corner displayed blinking at me. Through the process of elimination i determined only when the WD drive was plugged in did I have this problem. The WD drive wasn't the previous OS drive. Its just a basic media storage drive. I checked the bios for boot disk priority and the correct disk (the SSD) was listed as the top priority with a dvd rom drive just below it. The WD wasn't listed. From the bios i disabled the WD drive, but on startup the same issue persisted. This drive needs only be connected physically to cause this issue. The sata cable connections haven't changed from the previous install, the locations are just as they were before. I reset the CMOS, which aside from resetting the bios made no change in the bootup problem. At this point im stuck and don't know where to go next. Thank you.