A: No! The C:WindowsInstaller folder is used by the OS and should never be changed directly. If you want to remove applications, use the Control Panel Programs and Features to uninstall them. It is also possible to run Disk Cleanup (cleanmgr.exe) in elevated mode to help free up space.Click to see full answer. Similarly, is it OK to delete installer files?The answer is both yes and no. Assuming you’ve run the set up to install the programs they contained then yes, you can delete setup files safely. The programs will continue to work without them.Also Know, is it safe to delete Installer folder from Windows 10? No. One should not delete files from the WindowsInstaller directory as these files are required to repair, update and uninstall applications. That said, it’s safe to delete orphaned files (scroll down to see how to delete them). Also to know is, what Windows files are safe to delete? Here are some Windows files and folders (that are totally safe to remove) you should delete to save space on your computer or laptop. The Temp Folder. The Hibernation File. The Recycle Bin. Downloaded Program Files. The Windows Old Folder Files. Windows Update Folder. Should I delete my Windows setup files?Overall, you can safely delete almost everything in Disk Cleanup as long as you don’t plan on rolling back a device driver, uninstalling an update, or troubleshooting a system problem. But you should probably steer clear of those “Windows ESD Installation files” unless you’re really hurting for space.
