Working on an eMachines W6409 for wife's coworker (PC1). When it came to me, the USB keyboard and mouse did not work so I could not log on to any of their accounts. I removed the BIOS battery for several minutes (like 20-30), but it did not help. After various different attempts, I removed the HDD and slaved it into another computer I have (PC2). From there I ran a virus scan and clean, 53 infiltrations. Plug it back into PC1, didn't help. Internet searches didn't help. So I slaved it back into PC2 and formatted it for fresh install. Returned it to PC1, but still no USB keyboard (the light under the mouse was on). Got PS/2 adapters for both, still didn't work. Put HDD back in PC2 as solo drive (yes I moved the jumpers as required), but couldn't get it to read XP Media disc. Realized after a lot of confusion and swapping that PC2 had CD drive and disc was DVD (duh!). Connected DVD drive from PC1 to PC2, installed XP Media SP2. When connected to PC2 (surrogate computer), it loads and runs fine. When I remove the HDD and install to PC1 (original computer) I get a BSOD 0x0000007B. So I put it back in PC2, ran all the updates, then put it back into PC1 and got BSOD again.
So um, please help.