System Tuneup
Remove unnecessary programs from starting
Update virus software and check for viruses
Uninstall unnecessary programs
Delete trash and temporary files
Remove unnecessary network settings
Fine-tune display settings and set display to fit monitor windows
Run diagnostic software and correct disk/directory errors
Defragment the hard drive for better performance
Dust cleaning.
Note dust is the silent PC killer. A virus will ruin your data or freeze your PC, but dust can destroy your hardware thru heat buildup or in extreme cases, cause a fire. It is Recommend for you to clean the inside of your computer once every 6 months and to perform a full cleaning every year.