• Go to Start, (Settings), Control Panel, System. NOTE: You may need to 'Switch to Classic Mode' to see the System applet.
• Go to the Advanced tab. Click the Settings button under Performance.
• Select the 'Adjust for best performance' radio button, then Apply, and OK.
• The graphics aren't as flashy, but your computer will run a lot faster.

Learn about ReadyBoost:

• If you're using Windows 8, Windows 7, or Windows Vista, you can use ReadyBoost to speed up your system.
• ReadyBoost can speed up your computer by using storage space on most USB flash drives and flash memory cards
• You can also use disc booster program such as CLOUD SYSTEM BOOSTER and etc

CLEANUP YOUR SYSTEM.

Download ccleaner from the internet by typing ccleaner on google browser.

Install the program into your computer.

Restart your computer

Click on the ccleaner icon.

Choose any folders u want to clean

click start ccleaner..

Done.

If your computer suddenly starts operating very slowly, check to see if the case feels overly-hot. Especially in hot climates, make sure the computer as adequate air-flow around it. Overheating causes myriad difficulties and the computer bays in most work desks do not provide sufficient air-flow.

- download Microsoft Security Essentials to clean your computer from viruses ,spyware, adware, and other malicious softwares.

-Check windows free from infections