Where to buy Windows 8.1 with PayPal?

If you haven't used win 8 before,you may want to research a bit before deciding if you really want it - it's quite different than previous iterations of windows and depending on your gaming preferences,you may experience compatibility issues(on the other hand,it's also been reported to increase performance in other games). If you're studying/working in an educational institute(school,college,uni,etc),you may have a free key to claim from Dreamspark. I don't know about any specific service,but as always,triple-check that you buy from a reputable source that has a solid buyer protection policy,as once you've paid for the key disputes can be a nightmare to go through. Best of luck.

I had the 8.1 Enterprise in my job's PC. Then i bought and installed the "Microsoft Windows Embedded 8.1 Industry Pro with Update 32/64-bit (English)" to my laptop and PC at home and i can say that it is much more stable.

On the Enterprise i was running a few very heavy, RAM "eaters" programs due to my job and there were quite a few times when i had to restart the PC due to the massive lag it was caused (the programs were freezing even if i was using 8GB RAM and a 840 EVO). When i installed in the PC at home the Industry Pro (both job's PC and home's have the same parts), lags and freezing stopped! From that point on i installed on every PC/laptop i am using the industry Pro.

It's a bit more expensive, not every online store sales it, but if you have the money and you wish a PC that is going to last, get the industry pro edition.

As for where? I bought mine directly from Microsoft.

Don't!

If you're a student, maybe you should check Dreamspark. That's how I get my licenses forma Microsoft SO and SW