Yes, it seems legitimate.
Yes, it seems legitimate.
For $5 I’d just try to see what happens. In the worst case you’re down $5, in the best you’ve got a working Windows license. I just got a 20€ Windows 11 Pro license yesterday because my old Windows 7 key stopped working. Windows accepted it without a question, and now I have another decade of free updates if Microsoft offers similar deals again.
Talk about grey market keys is allowed within community guidelines. You may share information about websites offering them, as long as you don’t include affiliate links or promotional content. Using cracks or activators is against the rules on piracy. Still, I don’t suggest it. Most platforms selling these keys are unreliable and often deceptive. OEM keys are meant for authorized installers, not regular customers. They behave similarly to standard Windows keys, except they’re tied to the original hardware. There’s a risk these keys might be deactivated later, but it’s unlikely. Microsoft aims to promote Windows use and won’t disrupt legitimate users, even if the keys come from a company violating their licensing terms. They’re likely to stop selling them once they discover the source, and resellers would just shift their operations.
People can also purchase OEM keys from trusted sellers such as Newegg. These tend to be marginally more affordable than regular retail versions of Windows, though they share the same transfer restrictions as the cheaper alternatives.
We had all our grey market keys erased last year, bought from various sellers on multiple platforms over several years. They were removed from accounts and became invalid. We didn’t receive any warning or notice—Windows simply deactivated them, making them useless. Although the loss wasn’t huge given their value, it’s something to remember. Since they were grey market keys, we didn’t reach out to Microsoft about it.
The Windows 7 activation also got disabled on Windows 11, after a decade apart. It wasn't just a random issue; it seems tied to recent changes by Microsoft that halted upgrades for these older keys. It's unclear if the original key functions on Windows 7 anymore or is fully blocked. Had I skipped the CPU upgrade, it might have worked for years longer. Still, this outcome feels quite unfortunate. For the cost of one genuine key ($145), you can purchase 29 copies of these cheaper gray market keys ($5 each).
Based on my observations, OEM keys don’t have any transfer limitations. I’ve utilized mine for a decade across various Windows updates and entirely different computers. Simply connecting the key to a Microsoft account would suffice, and each time I accessed the new system, the key would renew there and expire on the previous one.
It wasn't a hardware update—it just happened one day instead of the next. All keys were lost and digital permissions disappeared. I'm unsure if they were meant for Windows 7 or sold as Windows 10, though the timing suggests a mix. Since Microsoft never explained it, I won't know the reason. But considering the price, it probably didn't matter.
I've heard about this situation, though I wasn't sure it was widespread. It could also hinge on how the keys are secured or sold, or whether the seller is distributing them to several buyers. If these were originally Windows 7 keys, the issue becomes even more unclear about their origin. It's a bit of a surprise how your experience might turn out. That's why it's understandable people buy grey market keys. The price gap—$10 versus $150—can mean the difference between upgrading hardware or getting the latest graphics card. I wish Microsoft would lower official prices or stop all the annoying ads during a purchase of $150. It doesn't make sense for Windows Home to cost $30 and still include ads, or for Windows Pro to be free of them while forcing updates that disrupt settings and push users to use Edge for the price.