I have an HP Vectra VL with a 400mhz Pentium II. I have had Windows 2000 running on it without a problem for over a year. My original 6GB HD was full, so I bought a second hard drive, a Western Digital 80GB. I connected the new hard drive, set the jumpers, went into BIOS and set the old HD as Primary Master and the new HD as Primary Slave. I then powered up the system and got a Stop Error while Win2000 was trying to boot. The error message read: "STOP: 0X0000007B (0XEF01B84C, 0XC0000034, 0X00000000, 0X00000000) INACCESSIBLE_BOOT_DEVICE". When I then disconnected the new HD and powered up again, Win2000 booted normally without problem. I checked the jumpers on both HDs, checked the BIOS, and everything appears correct. I also ran tests on the new HD and it appears fine. What's going on? I checked Microsoft's web site and it indicated it I might need to edit the boot.ini file. How do I do that? Any other ideas what the problem might be?