Register OCX and DLL files as system globals - Windows Client 12 Feb 2026 —

This article is part of our "Legacy Component Troubleshooting" series. Keywords: fast2001ocx fix, regsvr32 fast2001.ocx, runtime error 339 fast2001.

I stared at the screen. fast2001ocx . The High-Speed Document Upload Control. It was a proprietary ActiveX control installed on every client machine to handle bulk file transfers. It was finicky, it was archaic, and it was absolutely critical.

A dialog box should appear confirming the registration was successful. Troubleshooting Additional Issues Permissions: You must run the command prompt as an Administrator for the registration to take effect. Dependencies:

Install from Microsoft’s official download pages.