My computer came with win 7 I paid online to MS for win 8 then they had the update I did the update now my csr job needs me to have only win 8 or win 7 they say their programs are not working with 8.1, I need to go back to just 8 and get the 8.1 off my computer. How do I do this as I don't want to try and find the cd that I ordered years ago with this computer b/c I mean I did pay for the win 8 but I dotn remember getting a key as I just did it online when it first came out! So pretty much how do I just go back to 8. I tried the roll back but it is not there.