any one help me how i clean my computer

1) Disk clean up full
2) Temporary file
3) Cookies
4) clear Histore
5) restore file
6) delete all offile file

System Volume Information/_restore on main jo fazol file hain on ko kisay dele kiya jata hai , or jo be computer main kam na ane wali files hain on dele kistarha kiya jata hai , Documents and Settings main be asi files hoti hain jo kam nahi ati in sab ko computer se kasy dele kiya jata hai ?