You can see a number of DLL files in the Windows computer that help the computer applications to run properly. Every application is associated with a DLL files that helps the apps to run. But problem comes to you when DLL files get corrupt or missed from the computer. In this situation, you may get some error issues like VBRun300.dll is missing error in Windows. It is a very hazardous error situation that should be fixed as soon as possible. Due to the occurring of VBRun300.dll was not found error; you will not be able to run the computer comfortably. Therefore, it is very important to fix this issue with the help of the resolution given here. You can take the help of the manual method or you can also download and install Advanced System Repair tool to fix the issue automatically.