How to make speedy pc by deleting temp or prefetch file.

Instruction: 
For Temp: 
Click windows key and R in your key board simultaneously. Then type "temp" & press enter key. You will find some files what you should delete permanently.

For %Temp%: 
Click windows key and R in your key board simultaneously. Then type "%temp%" & press enter key. You will find some files what you should delete permanently.

For %prefetch%: 
 Click windows key and R in your key board simultaneously. Then type "%prefetch%" & press enter key. You will find some files what you should delete permanently.