|Look in Control Panel Add-Remove and see if there any programs that you never use. It is safe to Uninstall them from there. Don't be tempted to just pick off files (unless they are yours) because that almost always results in disaster.|
You could reduce your restore points by using the percentage slider. It all depends on how many you have (which depends on your disk size). If you have over a months worth then I doubt they are worth keeping. In this case slide it back step at a time.
Always pop back and let us know the outcome - thanks