If you have another machine with Win2K installed, you can fix this problem.
1) Search for MSCOMCTL.OCX on your other machine. (It's probably in your \winnt\system32 directory)
2) Copy it to the Win2K server having the problem. Put it in the same folder )\winnt\system32)
3) Run (Windows Key+R). Type (without the quotes) "regsvr32 c:\winnt\system32\mscomctl.ocx".
And that should do it! Enjoy!