If you're having problems but not getting an error code, start by finding out which version(s) of .NET Framework is installed on your computer:
- Open Control Panel in your Start menu.
- Click Uninstall a Program (or Add or Remove Programs in Windows XP).
- Wait for the list to finish loading.
- Find the version number(s) for Microsoft .NET Framework, close the window, and proceed to the appropriate set of instructions below.
If Version 4 is NOT installed, click here and follow the instructions in the Microsoft knowledgebase article.
If Version 4 or greater is installed:
- Download the .NET Verification tool from Microsoft employee and .NET expert Aaron Stebner's WebLog and run it, making sure to scan every version of the .NET Framework on your computer (usually, you'll see at least 3 in the drop-down menu).
- Make a note of which version failed. Failed versions of .NET Framework will need to be repaired or reinstalled.
- After repairing or reinstalling, run the .NET Verification tool again.
- After the verification completes, the Current Status line should read Product verification succeeded.
If the .NET Verification tool continues to detect problems, or if you are still having .NET Framework issues after passing verification, download and run the official Microsoft .NET Repair Tool. Should that fail as well, click here to visit Microsoft employee and .NET expert Aaron Stebner's WebLog and carefully follow his directions to download and run the .NET Framework Cleanup tool.