The file f4925_regctrl98.dll belongs to the 3dfxTools Registry Control created by 3dfx Interactive, Inc. 3dfx Interactive created the Voodoo graphics card. This file is part of the Voodoo card video driver. Drivers are software tools that help your computer to communicate with another piece of hardware.
An error with this file may disable to graphics on your computer. You should try to clean your registry to fix this problem. The registry tracks all the files installed on your computer. Every file has an entry in the registry database that tells Windows how to find and use that file with the programs that need it.
If an entry has a mistake, the program will not run and you will see an error. ZookaWare PC Cleaner cleans up those errors. ZookaWare PC Cleaner is a registry cleaner that checks through the thousands of registry entries for mistakes and fixes them for you. Use ZookaWare PC Cleaner to get your registry running fast and clean.