Error Message?

Every time l logon (WNT4 workstation), I get the following error message:

Cannot find the file ?C:\Program? (or one of its components). Make sure the path and the filename are correct and that all required libraries are available.

I don?t havea file or folder called Program in C drive. I search the registry there is no entry for C:\Program and there is nothing in the PATH as well.

Please HELP.