Clean your PC without softwer

We work on Pc long time.As a result pc gets slow for many unnecessary file.So if we delete this pc get faster...
So follow this step>>>

Start>run>cmd

Type             cd..  >enter

again type          cd..    >enter
Then type           tree          and      press Enter

when finished type      exit            and press enter

Run>prefetch   and press enter
A folder will open and delete all file of this folder...