Disk cleanup in Windows 10

Step 1: Open Settings app by clicking its icon in the left-pane of the Start menu.

Step 2: At the home page of Settings app, click on System icon.

Step 3: Click Storage. Under Storage section, click on the drive where Windows 10 is installed. For convenience, on the Settings page, Windows 10 displays Windows logo on the drive where Windows 10 is installed.

Step 4: Once you click on the system drive (where Windows 10 is installed), you will see the Storage usagepage. The page displays the disk space used by system and reserved files, apps & games, documents, pictures, music, videos, mail, desktop, other users, maps, OneDrive, and temporary files.

Step 5: As you can see in the picture below, just below the Temporary files entry, Windows 10 displays the space used by temporary files. On my PC, temporary files are using a whopping on 11.5 GB. Note that Windows 10 takes in to the account of space used by Downloads folder, Recycle Bin, the previous version of Windows (Windows.old folder), and temporary files folder while calculating the size of temporary files.

Click on Temporary files.

Step 6: Next, at the Temporary files page, select the check box next to Temporary files and then Remove files button to delete all temporary files from your Windows 10 PC. If you see the confirmation dialog, click Yes or OK button to begin deleting files.

The traditional way of manually cleaning temporary files

Step 1: Open the Run command box by simultaneously pressing Windows logo and R keys.

Step 2: Type %temp% and then press Enter key to open the Temp folder containing temporary files.

Step 3: Select all files and folders and then click the Delete key to delete all temporary files. It’s a good idea to move temporary files to the Recycle Bin and permanently delete them after a few days so that if a program or Windows doesn’t work properly after deleting temporary files, you can restore them.