If you have all your docs saved, follow this to remove GSP. You can then reinstall and hopefully it will work.
To remove follow these step's closely, go to start\find\files or folders type in the box GSP click enter key delete all the entry's it finds with GSP in it, do not delete any files that have gsp in the file name only those that start with the above. Next go to start run type regedit and press enter, go to menu under edit click find in the box type GSP and press enter it will bring up only one entry at a time, press delete key then click ok to confirm to go to next entry press F3 and delete do this until you get to the end of the registry. DO NOT TOUCH ANYTHING ELSE IN THE REGISTRY other than GSP then reboot your computer.
Then when your comp as restarted reinstall GSP