1. Uninstall any unwanted software or programs.
2. Empty your Recycle Bin.
3. Delete temporary files.
4. Move data and large files to an external hard drive.
5. Disable system restore.
6. Use disk cleanup tools, such as CCleaner.
7. Limit the size of system restore points.
8. Compress large files.
9. Clean up hibernation files.
10. Reduce the size of the page file.