You deleted some files, emptied recycle bin, moved some files to another drive but still you need free space. Because Windows is living, getting updates, creating cache files also you install new applications. First we will give a chance to Windows for disk cleanup then we will try to find more files to delete.
- Windows Cleanup
- Find more files
- Analyze Installer folder
- Continue to investigate files with WinDirStat
Right click to C:\ drive and select Properties. You will see Disk Cleanup button in General tab.
This will give you some space. You can see many unnecessary items here like temporary files, Windows Update files etc. If you are not happy with that space then continue.
WinDirStat is a utility that shows size statistics about your files and folders in your drive. With this tool you can see which folders and files have the most size. I love this tool because its graphical interface shows file types in colors, sizes as blocks. You can select a big block and see which file it is. For example I ordered folders and files by size. In my computer the Installer folder is very huge. It occupies nearly 30% size in Windows folder. When you explore in Installer folder you will see many setup and patch files. We can't know which file is used by the system or necessary by looking their names. File names are like "1a88ba.msp".
You shouldn't delete files from Installer folder because uninstall process will search for installation files in this folder. Alternatively you can backup this folder content in somewhere else or zip the folder. This may also can create workload because you need to put right file again to start uninstall process.
Patch Cleaner is an application that searchs Installer folder for unnecesarry files -namely orphaned files.
You can see necessary files with their explanation.
Orphaned file list shows files that are not connected to any application.
You can move orphaned files to another drive like a USB disk by pressing Move button.
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