Delphi 1.0 and Win NT 4.0 (DBF Database access)

Hello there !!!

I've performance problems with a Delphi 1.0 (with dbf database access)
application on a Win NT 4.0 client. The funny thing is, that the same
application runs on a another Win NT 4.0 Client with a higher
performance. The client installation is exactly the same (I hope so).

Who can help? What can I check, to solve this problem? Can virus
scanners be a problem?

Thank you