Microsoft has released a Windows 7 update that adds a new option in the Disk Cleanup tool called Windows Update Cleanup. With it, you can free up several gigabytes of hard drive space from the bloated Windows Updates folder.
Windows Updates can be terrible space hogs. Windows saves every security update and hotfix—even if they're superseded by new updates—in the WinSxS directory. You can't just manually delete everything in that folder, because some files are needed just in case a system file gets corrupted or you need to roll back a Windows Update.
So that's where this new Window