How to cleanup old hot fix information after installing SP1 (cleanup tool)
Once Service Pack 1 is installed you may opt to remove old information regarding old hot fixes and the SP1 un-installation tool as well. Note that if you perform this step you can NEVER remove SP1!
On most systems you should expect between 500MB and 1.5GB of space recovered by running this program. To run you must launch a command prompt with Administrator privileges, then execute the following command:
dism /online /cleanup-image /spsuperseded
This command will take between 5 and 15 minutes to complete, when completed you will now have SP1 fully integrated with no un-installation option. Enjoy the reclaimed disk space!