Hi Guys, I dont normally post endorsing a company, but this was so simple,straightforward and legit. I've just purchased a 4 year old laptop and wanted to upgrade from win 7 to win 8.1 pro, I didn't want to spend $100 for it and found this legit website that offers a substantial discount on win 8.1 pro (and other versions) and other Microsoft software. You simply choose what version or flavour of win 8.1 you want, checkout with paypal, and they send you the key via email within 6 hours (mine took less than an hour) you can get them to supply you with a download link for an extra £3 or you can just go to Microsoft website and download the any-time upgrade advisor, simply input the key that this company has sent you and you have a fresh copy of win 8.1 for £35 instead of £70-£80. If there are any problems then you can email a lovely lady called SARA and she will sort it out for you. I had no problems at all it was a straight forward process and hassle free. I would definitely recommend these guys. I can post the link but I don't want to upset the mighty Hilbert, if its OK to post the link I will but for now please PM me and I will send you the link. ** I am in know way associated with this company/website I am merely posting of my experience with dealing and purchasing from them. Kind Regards Deckard.