I am attempting to cannabalize an old machine and move a 200GB master and a 200GB slave from it to this DELL and am experiencing challenges. Upon attempted boot up, the 8200 flashes a blue screen error for only a sec (too brief to read) & then moves to the screen of boot up choices - recommending the "Last Known Good Configuration". When I try that, it will not boot up but cycles back through in a loop. IDE cable works fine with old 124GB HDD I am removing. Jumpers on new drives are set correctly. New drives are in correct position (master at end, slave in 2nd) on cable. Flashed BIOS to A09 (no other upgrades available). BIOS recognizes them by name and capacity (shows both at 200GB). Running XP Pro svc pack 3. What am I missing? Any input is very welcome. Thanks to all!

You can't just remove a drive from a computer, install it as the boot/OS drive in another system and expect it to work UNLESS the two system are identical as far as hardware goes. If the drive is seen in the BIOS, then you'll need to run a Windows Repair. Then, run all MS updates. "So won’t you give this man his wings What a shame To have to beg you to see We’re not all the same What a shame" - Shinedown

In addition to what Jennifer said, even after running a reapair it may or may not work. OEM versions of WinXP are keyed to the motherboard of the system they came from. This is because Microsoft doesn't want you to do what you did. Best to just connect those drives as secondary drives and not try booting to them. They will work just fine then. You won't be able to run any of the programs on them though.