It’s always a good idea to perform periodic maintenance on the PCs we rely on, and it’s probably just as good an idea to periodically review the items on our PC tune-up checklist. Here’s a start.

1. Make sure all service packs and security updates have been installed: Sure, most of us have this set to update automatically, but the update settings can and do get changed at times. And if the automatic update feature has been turned off, turn it back on.
2. Application updates: In most cases, it would also be a good idea to make sure all applications have the necessary updates installed. This also applies to the free stuff like Adobe Reader and such.
3. Update all virus protection files: Again, these are probably set to update automatically, but the same thoughts apply as the Windows updates.
4. Run a virus scan: And make sure it’s set to automatically scan periodically (preferably daily).
5. Scan for malware: I prefer Reanimator, as do most support pros.
6. Delete all temporary files: Including all software installation temp files, temporary Internet files, and so on. In coordination with the user, delete other files that may be obsolete or are no longer needed.
7. Empty the recycle bin: It’s amazing to see how large that can and does get.
8. Check applications and processes: Over time, the applications and processes that run (either in the background or foreground) tend to grow. Check to make sure they’re necessary and legitimate. I prefer Revo Uninstaller.
9. Firewalls: Verify that proper firewalls are in place and turned on. I prefer Comodo Internet Security.
10. Verify adequate space is available on the hard drive: Personally speaking, I don’t like a hard drive to get more than half full. If it’s approaching 75-80 percent full, it’s a good time to do some serious cleanup (either by the user or done with the user). If files and programs simply can’t be removed, plan to install a larger one.
11. Review the amount of installed memory: The current memory installed might have been adequate at one time, but with application updates and such, it might be prudent to increase the amount of memory.
12. Defrag and optimize the hard drive: I don’t really like Microsoft's defrag tool, but there are some good free ones available out there. I prefer Tune-Up Utilities.
13. Verify backup procedures: In my case, all data files are kept on and backed up from file servers. But if you keep data or e-mail files on the local drive, make sure backup procedures are in place and working.
14. Create a System Restore point: It might be prudent to do this more than once per year.