Cannot Copy File: Cannot Read from the Source File or Disk

When I use the XCopy command in Windows 2000, I can copy any file I like; however, when I use copy-and-paste or drag-and-drop in either Windows Explorer or PowerDesk, I get the following error:

Cannot Copy File: Cannot Read from the Source File or Disk

I searched the Microsoft Knowledge Base and came up with only one article, Q224378. This article seems not to apply to my situation because it applies to Windows 2000 Server. I am running Windows 2000 Professional with Service Pack 2. I did attempt to install the fix that article Q224378 suggested anyway; but, I got an error message that I was attempting to upgrade a program that didn't exist on my system.

I have also learned that this error applies when copying from either of my SCSI CD-ROM drives, not when copying from hard disks or floppies.

Any Suggestions?

 

I have stumbled onto a solution, quite by accident. Suddenly, the SCSI adapter disappeared from the Device Manager on one of the boots, making both SCSI CD-ROM drives unrecognized. On the next boot, I was taken straight into the BIOS setup screen to the processor speed settings menu. (This chip's speed is set in the BIOS.) There was a message in there that my processor speed was set incorrectly and that I needed to correct it.

This is an AMD 1800+ chip so it was previously set for 133 with a multiplier of 11.5. It was now automatically changed to 100 with the same multiplier. I ran it that way and the SCSI adapter reappeared. After a couple more boots, the machine got where it would hang before going into Windows as long as the SCSI adapter was in its PCI slot.

To shorten the story, I installed a BIOS update (1001 to 1001c) and all seems to work fine now. Of course, it could all start again.

Additional information:
This problem started after upgrading the board and chip in the machine from an earlier Asus board and AMD, Slot-A, 900-MHz CPU to an Asus A7N266 with an AMD 1800+ XP CPU and DDR RAM.