When in doubt, reboot. That summarizes one tip in this PCWorld compilation on troubleshooting your own PC problems. Other advice includes which malware scanner is best, how to measure your download speeds, and what to do when your computer is slow to start up. There's also a warning about knowing your limitations: "If you think the problem is too complicated, call up a more knowledgeable friend, or bite the bullet and work with a professional tech support service."
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