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Virus and Spyware Protection
Free antivirus, spyware, adware protection. Illustrates setup, registration, and configure settings. Avast and Avg are 2 good programs.
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Fixing PC Hardware Problems
Good troubleshooting procedure if PC experiences a hardware problem. You can use the Device Manager or Event Viewer and locate the problem there.
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How to Speed Up Your PC
How to speed up my PC using the Windows Task Manager, disk cleanup, and Checkdisk; also how to use Registry Editor to backup Windows Registry.