Windows 10 has a built-in tool to clear the cache, which doesn't take long. Here's how to clear the cache in Windows 10: 1. Type 'Disk Cleanup' into the search bar and select the program when it appears. 2. Select which drive you want to clean up in the new window that opens up. The system will automatically select the main drive where Windows is installed, but you can also choose to clean up any other drives attached to your computer. 3. Select the types of files you want to delete and click 'OK.' This will open a confirmation window - press 'Delete Files' to confirm. 4. Once the process is complete, you'll see a message telling you how much space has been freed up by deleting the files. Click 'Close' to finish up.