To free/save disk space:
- Limit Trash Can to 1GB
- Limit System Restore space to 5% or 2-3GB.
- If not required, disable Hybernation Mode in Power Management
then delete C:\hiberfil.sys
- Limit Virtual Memory to max. 2 x internal memory.
- For each account limit Internet Explorer cache to 50MB.
- Get Ccleaner at www.ccleaner.com
Make sure to Uncheck Cookies.
For each account on your PC let it Analyze and Cleanup.