|zerimar371, See if you can right click that unzipped reg file and choose "Merge". You can also try the reg file association fix at the same link.|
If you still can't run the file do the following:
Press CTRL-ALT-DEL and open Task Manager. Once there, click File, then hold down the CTRL key and click New Task (Run). This will open a Command Prompt window. Enter REGEDIT.exe and press Enter. Once regedit is open click File>Import and locate that reg file fix, hilite it and click Open.