VBC.exe cpu slow

The legitimate vbc.exe is a file associated with Visual Studio/Visual Basic. The file is usually found in a sub-folder within C:\Windows\Microsoft.NET. If you find it anywhere else it could be a virus, trojan, worm, or spyware. That would certainly cause your PC to run slower than usual.

Establish where the file is located on your hard drive, then post back with it's location (start a new thread).