There are a lot of home users that often get a computer that comes installed with the Windows 10 Home. And since Windows 10 Pro offers more features and utilities compared to Windows 10 Home, a lot of users also prefer to upgrade their Windows 10 Home computers to Windows 10 Pro. However, while doing so, a number of users reported that they encountered error 0xc03f6506 and they were not able to proceed with the upgrade.
If you are one of these users, when you encounter error 0xc03f6506, you will see the following error message on your screen:
“The last product key you entered can’t be used on this copy of Windows (0xc03f6506).”
This particular error tends to occur when you go on to activate Windows 10 although it can also appear during the upgrade process. In such cases, you will see the following error message:
“Unable to upgrade your edition, We can’t upgrade your edition of Windows. Try upgrading your edition of Windows again. (0xc03f6506).”
To fix the Activation Error Code 0xc03f6506 in Windows 10, use the options provided below as references but before you proceed, make sure that you create a System Restore point first.
If you have already upgraded from Windows 10 Home to Windows 10 Pro and you’re having trouble with its Activation, then you might want to apply some registry tweaks to fix the problem. How? Refer to these steps:
If the registry tweaks you applied didn’t fix the Activation error, then you can try using Command Prompt instead. Note that you can use this option in both scenarios pointed out above.
setup.exe /auto upgrade /pkey <YOUR WINDOWS 10 PRO EDITION PRODUCT KEY>
After entering the command, check if it was able to fix the Windows Upgrade or Activation error 0xc03f6506. If not, refer to the next given option below.
Just like the second option, you can also use this option for both the given scenarios above.
A slow PC startup can be pretty annoying. This usually results from various computer issues. If your computer is acting sluggishly, here are four ways to speed up your PC startup.
“Your PC ran into a problem and needs to restart. We’re just collecting some error info, and then we’ll restart for you. (0% complete) If you’d like to know more, you can search online later for this error: 0xc000021a”This error pops up when a user-mode subsystem like the WinLogon or the Client Server Run-Time Subsystem or CSRSS has been compromised fatally and security can no longer be guaranteed in the system. Thus, the operating system switches to kernel mode, and Windows won’t be able to run without the WinLogon or the Client Server Run-Time Subsystem. This is why it’s one of the few cases where the failure of a user-mode service can shut down the system. To resolve the issue, here are some fixes that might help.