Follow these Steps:

Follow the steps given below to improve computer speed and keep your computer safe.
Use Strong anti-virus to keep away your computer from mall-ware and spyware.
Never log out system with out closing all the applications and folder.
Use Disk space cleaner tools to free disk space.
If you want to delete a file permanently use SHIFT+DELETE.
Don't open too many folders or application at once.
Mosst common but yet we should remember this Refresh the computer every time when you log in. This can be done either by Functional key F5 or right click on the desktop screen and the click "Refresh" option.

RUN COMMANDS TO SPEED UP COMPUTER:

Use the following run commands to remove the system temporary and recent files whenever you feel that system is working slowly with that you can improve computer processing.

Open Run Command and type the following commands one-by-one and delete those files and folders permanently from your computer. Some of the files won't delete then let it be and skip those files.


RUN Commands:

Temp

%Temp% 

Recent

Prefetch

Ipconfig


This all commands Run and delete all file which file don't delete then it skip.
Note: those file which not able to trash from folder skip that because that files are active log

ENJOY!!!