bootup dies at personal settings

A client has an older Compaq mini-tower, 600 P3, 128 Ram, 9G HD, W2K Pro. A few weeks ago started seeing magnified graphic at shutdown, upper right corner of a screen with a Printer Icon and a Select Icon. Graphic now has moved to startup. Boots through non-passworded login screen, flashes this graphic, locks up with hourglass showing. I cleaned startup, registry run, runonce, etc. in 3 locations. Boots fine in safe mode. BIOS does not show HD. If boot Norton IS CD, C: drive is not seen. Boot W2K Pro CD, do emergency repair, no help. Any suggestions? thanks.