Unhandled exception: input string was not in a correct format

Problem:

Unhandled exception has occurred in your application. If you click Continue, the application will ignore this error and attempt to continue. If you click Quit, the application will close immediately.

Cause:

This problem occurs if the value of the following registry key is not empty or is set to an invalid value:

HKEY_CURRENT_USER\Control Panel\International\sPositiveSign

Here are steps to fix this problem:

1. Open registry editor. 

2. Go to: HKEY_CURRENT_USER\Control Panel\International

3. Select: sPositiveSign

4. Right Click (sPositiveSign) >> Click Modify Binary Data >> Add two pair of 2 zero’s in Value Data box as shown below >> Click OK.