How to Remove Unwanted Temporary Files in Computer?

Computer was Running Slowly and bad process on Reason of Unwanted Files in System Drive.

Given steps is Solve this problem.
Step 1: Start→Run.

Step 2: Type ' %temp% ' → ok. And Delete Files.

Step 3: Start→ Run→Recent→ ok. And Delete files.

Step 4: Start→ Run→ Prefetch→ ok. And Delete files.

Step 5: Go to Right click Recycle Bin → Click Empty Recycle Bin→ Delete All Files.

Finish.