Can you tell more, such as (for a start):
- Laptop or desktop?
- Make and model?
- Did it originally come with Windows 7, Windows 8 or Windows 8.1 ?
- What changed since it last worked?
- What do you do to turn of WiFi?
- What is the exact message Windows gives. I don't think it is "files are missing and cannot do so".
Kees
when i turn the wifi on the system crashes and keeps restarting utill i turn it off , also i tried refreshing the pc , it says files are missing and cannot do so , *** should i do

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic