It works properly, after activation. I would definitely do business again
Internet connection is required

Works perfectly! The key arrived within 24 hours by email and Windows were activated immediately, according to the detailed instructions included in the email

It works perfectly both on a clean install and by activating it through the Windows settings. In fact, at first I got confused and installed Windows on the HDD, activated the key, and then after realizing I was running the software on the hard drive, I formatted it on the spot to install it on the NVMe, and with a fresh install it worked perfectly and it even shows that the digital license is active. Now, as for Windows 11, you already know it, very sluggish software, with every update we cross our fingers for what it will bring and what it will "break" on our PC. Overall, it runs normally and the license will work, so you can go ahead and buy it without fear. If you want better prices, obviously go to allkeyshop, I just personally wanted to support a Greek store.

Works perfectly. I bought it and they sent me the license by email within 2 hours.
The installation of Windows 11 Pro was a breeze, it took me 15 minutes with a USB flash drive. As soon as I pressed the power button, it read it immediately (no BIOS or anything), the drivers worked properly (mice, keyboards, etc.). During installation, you don't need and it's best not to have an internet connection.
During the installation, it asks you for the key and there you see that it is for 11 Pro. (when you download Windows to the USB flash drive there is no option, it is one download for both Home and Pro)
All updates were done from the Microsoft site.
Even if in the future I need to format or something else and the key doesn't work, I just buy another one (the purchase price is very low).
The review concerns a new installation on a brand new gaming PC.

No problem. Security updates and annual feature set upgrades. More stable and functional than Windows 10 and lighter for small computers, due to better dynamic resource management of running applications. This is an OEM license, so do not expect support for issues from Microsoft.

ATTENTION!
None of the licences sold by these shops are RETAIL. This means you can only use them once and they do not work after formatting. To be sure, send them an email before you buy. To check if the licence you have used is RETAIL, in a Windows terminal execute this command: slmgr /dli
A popup will open that should say Description: .... Retail Channel

Very good product, this is the second time I buy it. I already had Windows 10, and since support for them ends in October, and also because I upgraded my laptop with a new hard drive and RAM, I decided to move to a better operating system. For those who have trouble and their key is not recognized, they should watch a video online that explains the activation process in detail. At first, it gave me Windows 11 Home activated for free right away, because it recognized that I previously had a Windows 10 key, but in the key change section, it did not recognize the key for Windows 11 Professional. You first need to disconnect from the internet, insert a generic key/code and reset the computer to activate Windows 11 Professional, and then insert the newly purchased key with an internet connection so that it activates correctly.

You buy it and they send you the Activation Key by email.
You do not receive the Windows.
You download Windows 11 from the official Microsoft site.
I choose installation on a USB Stick via Microsoft's media creation tool, with which I download Windows and select installation on a USB Stick.
I have done 5 installations so far.
I have bought the keys from different stores here on Skroutz and they all worked fine!

I have attached a photo of the email (with the key blurred out)
So you can get an idea of how you will receive the key!

And something important!
After a format (hardware did not change) and a clean installation of Windows 11 Pro with the same Microsoft account, the same activation key was used normally!

I have tried it in games and it has a 5-10% increase in fps. Very nice performance and quite cheap. The reason I rated it 4/5 is because it doesn't run on all computers and requires a relatively good pc.

Furthermore, this specific window is excellent, it does not stick, it does not take long to open, it does everything, it is PERFECT!!!!!