Delete Windows Old Files
You can delete the old files on Windows taking up your system space and making your system slower. It actually stored in time of installing new programs, operating system, and even on downloading. It will be stored automatically even if your upgrade your Operating System. Follow the simple steps below to delete the Windows old files
Click Start.
Type in disk cleanup in the search box.
Click the Disk Cleanup link from the results.
The Disk Cleanup window appears. Click the Clean up system files button near the bottom.
Disk Cleanup will begin scanning your drive. Once complete you should have Previous Windows installation(s) as an option. Check it off to remove.
When you have all the check marks in place press OK and confirm the deletion.
Give it a few minutes to finish deleting the files and say hello to the extra hard drive space.