If you've upgraded an existing Windows installation to Windows 8, you'll probably have a very large Windows.old folder left over. This contains the old Windows data, should you need to recover an old information. Assuming you don't, it's safe to delete and recover a significant amount of storage space. It's not possible to delete this using Windows Explorer as you'll get a number of permission errors, but thankfully there's an easy method to remove it. To begin, search for "[B]cleanmgr[/B]" from the start page and run the application: [CENTER][ATTACH=full]129[/ATTACH][/CENTER] Then, select the drive to clean-up (it's almost always C: ) and click [B]OK[/B]: [CENTER][ATTACH=full]130[/ATTACH][/CENTER] After a few moments, the clean-up Window will open. Now, click the "[B]Clean up System Files[/B]" option and select the same drive letter: [CENTER][ATTACH=full]131[/ATTACH][/CENTER] Now, you'll be able to select "Previous Windows Installation(s)" from the list, which is the Windows.old folder data. Tick this and click [B]OK[/B], then in a few moments you'll recover the disk space to be put to better use: [CENTER][ATTACH=full]132[/ATTACH][/CENTER]