Reclaim Hard Disk Space After Installing Windows Vista SP2

After installing Windows Vista SP2, various leftover files and remnants (including unnecessary components from Vista SP1) will be left on your system. Microsoft includes a tool with SP2 that can automatically delete these files. To run the tool, follow these steps:

• Click Start then type cmd in the search box. Right-click on the cmd and click “Run as Administrator”
• Type compcln.exe at the command prompt and press enter
• Follow the on-screen prompts

Note, however, that you may not want to run this tool until you are sure that you would like to stick with Windows Vista SP2. After running the clean-up, you will not be able to easily revert back to SP1 via System Restore.