The file f4923_base.dll is a component of the 3dfxTools Registry Base created by 3dfx Interactive, Inc. 3dfxTools is part of a video driver for the Voodoo graphics card. A driver is a software tool that allows your computer to interact with another piece of hardware.
If there is an error with this file, Windows will not be able to use the video card that it runs. You should clean your registry to fix this issue.
Dynamic link library files contain code and other instructions that programs need to run. They are tracked by the registry, which has an entry for each dll file installed on your system. If the entry in the registry is incorrect, your computer will not be able to run the dll file when it is needed, breaking the program that relies on it.
ZookaWare PC Cleaner solves this issue for you. ZookaWare PC Cleaner checks through all the entries in your registry for mistakes and fixes them. Try a ZookaWare PC Cleaner scan now and get back to gaming quickly.