PCs slow after Server Lockup

I had a Windows 2000 Domain Controller freeze up yesterday. It ran out of Paged Pool memory. Reference the following article at MS for the reason why. http://support.microsoft.com/default.aspx?scid=kb;en-us;312362&Product=win2000.
I was able to do a soft shutdown and reboot and all users were able to connect back to the server with no issues. The only problem that I am having now is with users that had open files to the server when it locked up. Their PCs are now dragging. It isn’t just when they open files on the server. Even if they open files on their local harddrive it will take up to a minute to open a small Excel file. Does anyone have an idea what could be causing this. Thank you in advance for your help. FYI, the PCs are all either Windows 2000 Pro or XP Pro.