You cannot change your wallpaper, lock screen colors, or account picture.
Microsoft frequently patches exploits used by these tools, which could de-activate your OS later. The Best Way: Use a Genuine Product Key Download Activator Windows 8.1 Pro Build 9600 64 Bit
Type slmgr /ipk [Your-Product-Key] and hit Enter. (You must use a valid Pro KMS key). You cannot change your wallpaper, lock screen colors,
Windows 8.1 is an older operating system, and many retailers sell genuine product keys at a significant discount. Using a legal key is the only way to ensure your 64-bit system stays secure, receives all updates, and avoids the "cat and mouse" game of using third-party cracks. Conclusion You cannot change your wallpaper
If your copy of Windows isn't activated, you’ll encounter several annoying limitations: