Windows Drive Cleanup

I noticed I have just 5% free space on my laptop's C drive. To clean-up the computer, I followed the following process (my laptop runs under Windows XP):

• Clean-up temporary Internet files using Internet browser(s) (for all accounts / browsers)
• Install recent CCleaner version (here the download link) and run it
  • Cleaner - clean all temporary files
  • Registry - registry cleanup
  • Tools
    • Uninstall - uninstall unneeded programs (similar to Control Panel --> Add / Remove Programs)
    • Startup - cancel automatic launch of unneeded programs upon startup (similar to Run-->msconfig)
• Run Windows Disk Cleanup Utility
  
  • My Computer --> right click on the drive --> Properties
  • Choose Disk Cleanup
  • Press OK to clean-up
• Remove Windows restore points except the last one (this alone saved me above 1 Gb)
  • My Computer --> right click on the drive --> Properties
  • Choose Disk Cleanup --> More Options --> System Restore Clean up
• Run Full Service Scan from Windows Live OneCare
  • It found several registry problems undiscovered by CCleaner
• Look for very large files that are candidates for manual removal, and remove them
  • Go to My Computer --> right click on the drive --> Search
  • Select option What size is it --> Specify Size (in KB) --> at least 5000 Kb
  • Sort results by decreasing file size
  • Remove unneeded files manually
• Install recent Defraggler version (here the download link) and run Defrag (takes several hours)

As a result, I now have 25% free space and, hopefully, better performing applications.