I have an HP Deskjet 1000C printer and a Dell Dimension 8100 running Windows 2000.
For some reason the printer quit working. The printer seems okay, it'll print a test page and so forth. So I decided to delete the printer (from the printers folder), then reinstall it.
I checked the HP page for the latest driver, and under Windows 2000 drivers for my printer it says that the latest driver for my printer is on the W2000 CD. So I popped in my CD and tried to add my printer using "Add Printer..." in the printers folder.
I filled in all the pertinent information. When I picked the Deskjet 1000C driver from the printer list, it told me that the driver had "not been certified by Microsoft". I clicked OK. It seemed to start copying files but then said "the driver or folder is corrupt. Please try again" or something like that.
There were two versions of the driver on the Windows 2000 CD--a Microsoft version and an HP version. I had tried the Microsoft version first, so I tried the HP version. Same story, except it said "Some files are missing or incorrect, try reinstalling or getting the latest version."