The f4926_3dfxcmn.dll file is a part of the 3dfxTools Common Library created by 3dfx Interactive, Inc. The 3dfxTools program is part of a video driver for the Voodoo graphics card. The Voodoo graphics card was a popular card for gamers as it allowed enhanced graphics. The driver allows your computer to work with the card.
If you have a problem with this file, the graphics on your system may not show correctly if at all. You should clean your registry to fix this issue. The registry is a database that serves as an information booth for your computer, tracking all the programs and files installed on your system and keeping data on how to use those files. If an entry in the registry database is wrong, it needs to be fixed, or cleaned.
ZookaWare PC Cleaner tackles that task for you, checking the thousands of registry entries for errors, and fixing them. You should regularly be cleaning your registry to keep your system running fast and error-free. Try a free ZookaWare PC Cleaner scan now to see if your registry is in need of some cleaning