I'm not sure if this is in the right place, but here goes ... I wanted to reformat a Dimension 4100. I inserted a Reinstallation CD provided by Dell with XP Home SP1 in the CD drive. I rebooted and followed the directions listed here: http://support.dell.com/support/top...kb/en/document?dn=1070879&c=us&l=en&cs=&s=gen I get the following error: "Invalid Boot Diskette Insert BOOT diskette in A:" I tried upgrading the BIOS to A11 (it was A03) and received the exact same error message. The CD is not scratched, and the drive (there is only one) is working properly. Suggestions welcome!