1. Go to the 'Start' menu, type 'run' in the 'Start Search' box and press 'Enter.'
2. Type 'regsvr32 'C:\Windows\System32\msxml3.dll' in the search field of the 'Run' window and press 'Enter' to register the DLL file.
3. Click 'OK' in the confirmation pop-up and then restart your computer.