Activation keys
I strongly suggest using activators for versions above Windows XP, they are located in the same directory. The keys aren't guaranteed to work with disc images from other sources, they are carefully selected specifically for this software repository.
Windows 11
Go ahead and download HWIDGEN.
You can also use KMSTools.
Windows 10
Go ahead and download HWIDGEN.
You can also use KMSTools.
Windows 8 / 8.1
Go ahead and download KMSTools.
Windows 7
Go ahead and download Chew7.
You can also use KMSTools.
Windows Vista
Go ahead and download the Vista Activator.
Windows XP
x64 - VCFQD-V9FX9-46WVH-K3CD4-4J3JM
x86 - MRX3F-47B9T-2487J-KWKMF-RPWBY
G7VKM-WM72Y-JJXGT-F4BJG-D6RPQ
Windows ME
B6BYC-6T7C3-4PXRW-2XKWB-GYV33
Windows 98
Second Edition - RW9MG-QR4G3-2WRR9-TG7BH-33GXB
Windows 95
24796-OEM-0014736-66386
Windows NT 4
28997-OEM-0025957-49297
30495-OEM-0006276-08104
40159-OEM-0211111-11111
34698-OEM-0039682-50656