- Disk Cleanup 
- Remove temporary files and folders 
- Remove any lingering files, (0 size files) 
- Remove folders from system not containing information 
- Delete old system recovery folders 
- Cleanup windows download temp directory 
- Check printer temp files 
- Run file system check and hard disk surface scan, run manufacturers optimization utility 
- Defrag hard drive to ensure overall responsiveness 
- Perform windows start-up speed boost (system operational in 30 secs from boot) 
- Optimize the window swap file for optimum performance 
- Optimize and ensure network protocals are correct 
- Ensure browser internet security, add-on and speed are good 
- Optimize your pc for best performance, appearance, and stability 
- Ensure any critical updates, security patches have been done 
- Check virus software is up to date, and scans are scheduled 
- Check hardware drivers, dll's and update as needed 
- Overal System check, over view 
- CPU/Video and case fans are running well and free of debris 
- Power supply fan is running well, ensure cool temperature 
- Memory check, passes tests 
- CPU check and temperature is acceptable 
- Motherboard passes visual inspection – leaking capacitors? 
- System backup has been performed in the last 6 months 
- Event viewer, go over log files, ensure no system abnormalities