• Empty the Recycle Bin and the temporary raw Internet files.
• Run Microsoft’s maintenance tools: ScanDisk, Disk Cleanup, and Disk Defragmenter.
• Enable automatic Windows Updates.
• Delete unneeded items from the Windows Startup menu.
• Back up your data.
• Remove dust from vents on the case.
• Don’t install software you don’t need, especially from the Internet.
• Install antivirus and antispyware programs, and use a firewall.
• Turn your computer off when not in use for long periods, such as at night.
• Enable Windows XP’s System Restore or install a program such as Norton GoBack from Symantec, which can return your PC to its pre-problem state.

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