My computer is almost full and I have discovered that I have approximately 3GB of ntuninstall files. Can I delete them safely? Georgia Wilson
The ntuninstall files are created when you install a Microsoft hotfix or security patch. They store old files so you can uninstall the patch if something goes wrong. You can compress them (right-click a folder and check the box marked Compress contents to save Disk Space). If you are sure you will never want to uninstall a patch, you can delete them. However, these are protected files, so if you simply delete them, Windows will cleverly make backup copies, and in the short term, you won't actually save any space.
The best option is to run CCleaner, which can remove all sorts of unwanted files. The latest version v1.27.260, released on February 14, now includes Windows HotFix Uninstaller cleaning.