Windows 10: Switching Motherboards

I have a Pre-Built Omen by HP computer that came with Windows 10. I'm switching out the motherboard with a new one so I was wondering if I need to buy windows 10 product key or not. I know its an OEM version but in the Activation settings it say "Windows is activated with a digital license linked to your Microsoft account'. Do I need to buy a key or not?

:)

 

Choice of memory and motherboard... a bit stuck...

No one who got some suggestions on this one, huh?

I've found out that the Asus M3A78-T needs to be flashed, so then that motherboard is excluded from my list. Which motherboard and memory should I then go for? Any suggestions?

 

Airplane mode switch not working

Since the troubleshooting steps that were provided did not resolve the issue, we suggest switching on the Radio Management Service. To do that, please follow the steps below:

• Press Windows key + R.
• Type services.msc, then hit Enter.
• Search for Radio Management Service.
  
• Right-click, then choose Start.

Note: Never ever set this service to "Disabled".

Get back to us if the steps won't work.

 

PC starts only with PSU switch, beeps and turns off

I should know what's up by tomorrow evening. Thanks for all of your input.

I'm one who tries to think of step 2 before step 1 is finished. If this doesnt work I may be looking at finding a cpu/motherboard combo that I can afford that has at least the same performance as what I have, which was new in 2011. I will be upgrading eventually in the next year anyway. Any suggestions of a CPU/MB for around $300? Or less?