Weekly

1. Windows Update
   Download the latest critical patches and security updates from Microsoft Update.
2. Disk Cleanup
   Remove temporary files to speed up your computer. Click on Start, Run and then type: cleanmgr
3. Scan for Viruses
   Your anti-virus program can’t protect you if it doesn’t know about the latest viruses and threats. Run your anti-virus program’s auto-update feature and scan for viruses. AVG is a popular and free antivirus program; we've had great success with Avira AntiVirus.
4. Scan for Spyware
   Spyware is just as dangerous as viruses yet often more difficult to detect. Run your spyware program’s auto-update feature and scan for spyware. Spyware Doctor is a popular and free antispyware program, available at Google Pack.

Monthly

1. Repair Disk Errors
   This is one of the most often overlooked maintenance tasks. Running this helps to prevent file system damage before it occurs. Open up the My Computer icon, select your hard drive, then click on File, Properties, Tools, Check Now.
2. Defragment
   Organize your files and speed up your hard disk. Click on Start, Run and then type: dfrg.msc
3. Backup
   Use an external hard drive, flash drive, or an on-line professional backup service like Mozy.