Windows 8.1 Pro / Professional KEY

Microsoft Windows 8.1 Pro / Professional KEY:


Key type: ONLINE


Before submitting a complaint, make sure that the system is in the correct version , e.g. the Windows 8.1 Pro key is used on Windows 8.1 Pro (error  xc004f050 – incorrect version) and the Internet is turned on, it is recommended to provide the error code in the complaint.



System download link: (Recommended)

Or (ISO file):



System activation:
Click the start menu button  and enter text ” Activation “, select ” Activate Windows “, then enter the purchased key and confirm .



Here you can buy key:

Windows 8.1 Pro KEY


Windows 8.1 installation instructions:

1. Create the installation media using this link :

( Needed Pendrive or DVD with a capacity of at least 8 GB ) then run the program, select the following options: Accept / Create installation media / Next / Next / USB flash drive / Next It is recommended to install the system in the 64-bit version – a minimum of 2 GB RAM is required for the 32-bit version – required minimum 1GB RAM . (We do not recommend installing the 32-bit version)

2. Plug in the installation medium, start the device, if the system installer appears , go to step 4.

If the system installer does not appear, turn off and on the device and immediately click the button: F9, F10 or DELETE
Depending on from the manufacturer of the motherboard, these are different buttons, usually they are: F1, F2, F3, F4, F5, F9, F10, DELETE
(During system startup, information about which buttons can be selected is usually displayed) 

3. Go to the BOOT section , then set first, the media with the system, then save (Usually F10) and restart the device.

4. In the system installer, select the language, time format, keyboard layout and select ” Next “, ” Install now “, enter the key.

OR select ” I don’t have a product key ” and select the appropriate system (8.1 Pro) version WITHOUT the letter N .

5. Check ” I accept the license terms ” and click ” Next “, after installing the system, remove the installation media and restart the device.

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