Buyer beware! I purchased a copy of Office 2021 Professional from Stack Social (via Yahoo) for $49.99. When I used the product code they provided after paying, and I followed their "Redeem Product" link, I ended up with Office 365, with a request for a subscription payment. I deleted the newly downloaded Office 365 software and tried again. Same incorrect results. I reported this problem to Stack Social Customer Support. They continue to tell me via e-mail to "try again". Three weeks later, I *STILL* don't have a functional copy of Office 2021 Professional for which I paid (proof of which is in the enclosed image). Worse yet, I was instructed by Stack Social Customer Support to fully delete my existing copy of Office 2010 Professional before installing the new software. (They said it would interfere with and/or prevent the proper installation of 2021 Professional.) Stack Social (vendor for the MS Office product through Yahoo Lifestyles) is very slow in responding (sometimes taking days to reply), and they continue to tell me to do the same steps that fail every time. I now get several errors when attempting to download Office 2021 Professional. The latest errors tell me "This program has already been downloaded", and I'm directed to a link for my "Microsoft Account". When I click on that link (mind you, this is AFTER I'm logged in), I briefly see "Office 365" (which I did NOT purchase!), and then get "We can't find your account" errors, and I'm given NO option to download any software. I've been asked to provide proof of purchase, which I've done EVERY time. Stack Social staff continue to tell me to repeat the same steps that do NOT work. I'm now in a position where I don't have use of my original Office 2010, and because Office 2010 isn't supported by Microsoft any longer, their "Authentication" steps won't work to reactivate Office 2010 software I bought new along with my [then] new computer. I have the product code and activation key for Office 2010 Professional, but the Microsoft "authentication server" says it's no longer supported and no activation key will be provided. I don't have Office 2021 Professional I purchased from Stack Social, and find myself in a very difficult position of not being able to support my clients because I can't re-install my original copy of Office 2010 Professional. Support from Stack Social has been dismal to non-existent. They are VERY slow to respond (sometimes taking days), and a resolution has NOT been forthcoming from their Customer Support people. In fact, when I *do* get an e-mail reply, it's been from different people each time. If I could give them ZERO stars (or even NEGATIVE stars) .. I would. Will the loss of $50 be serious? No. What IS serious is the fact I no longer have any functional "Office" software .. which I'll now be forced to purchase a new copy .. and I will NOT buy it from these people!! (I have no choice. My Excel files have embedded macros that require Microsoft .. which I now regret. At the time I created the spreadsheets, MS was the only program with that functionality. "Compatibles" won't work for me.) StackSocial doesn't allow "returns" of their software, and after nearly a month they STILL have not resolved the situation .. even though the mistake is THEIR fault! Bottom line: Do NOT purchase Office 2021 Professional from Stack Social. It's bait-and-switch!!