The v3mat.dll file is an unknown dynamic link library file. When you get an unknown file on your computer, you should not panic. The programs on your computer are made up of many files, and it is not possible for every single file ever created to be identified. As a dll file, this one is able to run code, however, so because you are not certain what it is you should probably run your antivirus software just to be safe.
We also recommend running SpyZooka to check for a spyware infection. If your scans come up clean, the error you are getting with this file may be a registry problem. Clean your registry to solve it.
Every Windows computer has a registry database at its heart that keeps track of all the files and settings for the software installed on that computer. A problem in the registry can mean that Windows cannot find the information it needs to run your programs. Fix it up with ZookaWare PC Cleaner.
ZookaWare PC Cleaner cleans up registry problems and gets your computer back into action again quickly. Run a free scan now to see what your registry needs to be healthy again.