Have a dell latitude 5420.I had win 7 pro on it but as far as I'm concerned Microsoft lied to me and said my comp was ready for win 10.So being the sucker I am I put it on months ago.Ive had nothing but problems with it and frequently get the blue spinning circle of death.Dell does not support win 10 for this laptop so I cant update it.My comp was preloaded with win 7 ,is there anyway to get it back?