Power Failure - File Sharing Problems

In our office a co-worker accidentally unplugged their PC while they had several peer-to-peer shared files open (primarily a shared Access database). Since that time, performance with those essential programs for that computer has been significantly slower than before to the point where it is almost unusable. The rest of the computers in the office and the shared file seem uneffected to others.

I re-installed Windows 2000 and the Office 2000 suite on that problematic machine but the problem persisted. I then did a clean install hoping to wipe out any issues and start fresh, but it is still the same and getting an error message when trying to copy large files (some drivers and software to reinstall on the system) to/from the shared computer mid-effort: "Specific network name no longer available".

I was going to attempt to install a previously unused version of Windows XP Home Edition to see if that improved anything, but it instructed me that I couldn't upgrade from Windows 2000 unless it was to the professional version.

There is also an office printer shared from this PC, and though people in the office can still print to it the performance of the print jobs is also noticably much slower and sporatic.

I am not sure if these symptoms are hardware or operating system related. Other than the file sharing issues, the computer seems to be operating independently satisfactorily. I'm hoping to get this resolved before we decide to just scrap it and buy a new PC.