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Why does computer run slow?

Updated: 8/17/2019
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Wiki User

11y ago

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Due to unwanted files cluttered on your system registry. You just need to clean and maintain your PC properly so that it will not give you slow PC startup or runtime error problem. The following shows some common reasons that can cause a good PC to run slower & slower.

  • Spyware and viruses attacking. Malicious software, such as spyware, can hurt your PC's operation - as well as put your confidential information at risk.
  • Too many applications running at the same time. For most computer newbie, you may not know every application that is running.
  • Not enough free disk space. Every PC needs at least approximately 30% free space to ensure every service run smoothly.
  • Fragmented hard drive. Simply put, hard drive fragmentation refers to the state of a disk that's endured a significant amount of usage over a period of time.
  • PC or processor overheating. Excessive heat can cause a significant decrease in computer performance some processors will even lower the speed of the processor automatically to help compensate for the heat related issues.
  • Windows registry & driver issues. There are times when Microsoft Windows will not start due to a corruption in the Windows registry or missing related device drivers.
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