for some reason about a thousand exe files popup in my downloaded folder, and each time i delete them they keep coming back i dont no what the problem is, can someone help me plz.

Sounds like you have a virus. Check the sticky below for more info.
WARNING: Viruses on the network you should be aware of

If you need more help, point 5 of that sticky has links to help sites...try Norbiesworld.
Always make sure that you're using a good AV program. Keep it updated & scan downloaded files before opening.