Step 2: When the Properties window appears, go to General and select Disk Cleanup to clean up junk on the drive. Step 1: First you need to open This PC and right-click on the drive to clean the junk file, then select Properties. Manufacturer Microsoft has understood the needs of users, they provide a self-cleaning feature for you to use to save time and free up memory space on Windows. Delete junk files of each hard drive on Windows 10