I won't be getting Windows 10. It comes preinstalled with Candy Crush Saga. That is some bullshit. King is the slumlord of mobile game companies and I don't want more bloatware than Microsoft already wants to ship with Windows. Also, I have a massive library of games, some of which I've had to tweak to work with Windows 7 because they came out when Windows was on double digits, so I don't feel the need to upgrade either.
Yeah, it's not that I hate Candy Crush Saga with a burning passion, it's that I didn't decide to install that piece of software, so I shouldn't have to deal with it being on my system. It sounds high-strung, but it's like if I went to a burger joint and wanted a plain hamburger, but you want to sell me a deluxe with all kinds of extra stuff that I don't want on it because those companies paid you to make sure their product was on the hamburger. Sure, I could scrape all of it off, and we'll even pretend like remnants wouldn't be left on the burger, but that's not what I want as a customer. Yes, my rig can handle the extra software. I might have even used some of it if left to my own devices, but I sure as hell don't want someone else telling me that I must install this software on my PC in order to install Windows 10. To be fair, I believe that one you install it the first time, you can go ahead and do a clean install without any bloatware, but it's just the fact that Microsoft wants me to install it in the first place that turns me off. It's the principle of the whole situation.
Short answer is I believe you can. I made a more detailed reply to War below.