And this will happen. Since only Microsoft can fix activation issues you (and I) end having to call this in.
You have a VALID ISSUE. But let me warn you to never say "I upgraded my motherboard." That will not get you a new key. What you must say is the old motherboard DIED and this is the new board to replace it. Vary the story and Microsoft may deny the new CDKEY.
I've had to replace the motherboard in my Dell D830 Laptop. I purchased this unit 3 years ago as 'refurbished'.
It included MS Windows 7 Home Premium and MS Office Professional 2010.
When I started the system following the repair, Windows informed me that it had 'detected a hardware change...'
And I needed to 'Activate' within 3 days. However, I restarted the system and I haven't been asked to 'Activate' again (4 days since)???
It's a different story concerning the MS Office Professional, as that is constantly requesting 'Activate' each time I attempt to use Word 2010. I'll address that issue next time I have access to WiFi @ my nearby cafe. Just need to locate 'Product Key'.
Can anyone possibly explain why MS Windows 7 Home Premium seems to have accepted the replacement motherboard + increase RAM from 2GB to 4GB?? The system seems to reliably boot up each time, allowing me to use VLC.