I know there are a bunch of threads just like this one out there, but I couldnt find one person that changed the HD like I did, so here it goes:
Well, I just changed my SSD and my RAM and now my windows is not activated anymore.
My old SSD had an activated copy of windows 10 that I earned from free upgrading from windows 7.
Then, to install the new SSD, I just removed the old one, put in the new one, connected my flash drive containing windows installation file and installed skipping through wherever asked me for liscence key.
Now it says my windows is not installed and it gives me this error
Error code: 0xC004C003
Thank you for the atention