Hi there and welcome
Please note this will remove all data from your computer and return it to new, so backup anything you first wish to keep.
Then click on Start, Settings, Update & Security, Recovery, Get Started under Reset this PC
Choose the option to Restore Factory Settings.
Complete this and when done the computer will be as new, just like when you purchased it.
If you have any problems, or would like any additional information or assistance, please do not hesitate to let me know.
And if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.