[SoulZeh]

So I've upgraded my PC due to it power surging and everything pretty died however, I'm getting an error saying I need to activate windows but it's only because of the "To Be Filled O.E.M" thing, I was wondering, what in the name of hell do I do..

I'll add I had to change motherboard, power supply, cpu and RAM.

[BiNBo]

It seems like the error you're encountering is related to the OEM (Original Equipment Manufacturer) information not being properly configured after upgrading your PC components. When you make significant hardware changes to your system, Windows may not recognize the new configuration, and as a result, it asks for reactivation.

As far as potential solutions, I'd say to first check for Activation. Ensure that your PC is connected to the internet, and try to activate Windows again. To do this, right-click on "This PC" or "My Computer" and select "Properties." Scroll down to the Windows activation section and click on "Activate Windows." Follow the on-screen instructions and see if it successfully activates. You can also troubleshoot Activation. Go to "Settings" > "Update & Security" > "Activation." Click on the "Troubleshoot" option, and Windows will attempt to detect and fix any activation-related issues.

Keep in mind that if your previous Windows installation was an OEM version (pre-installed on a pre-built PC), it might be tied to the old motherboard and might not be transferable to the new hardware. In such cases, you might need to purchase a new Windows license.