Any idea how I can get full access to my BTC on it?
-snip-
Seems like I am missing a step where I can authenticate my PC as being the 'primary' location for the wallet?
I think this is where your confusion is.
Electrum and all non-custodial Bitcoin wallets doesn't work like accounts, your wallet simply contains the "
private keys" that can spend your coins in the Blockchain.
So by simply copying the wallet file or restoring the seed phrase, you basically copied your wallet from your old laptop to the new PC, both has access to your coins, there's no "
primary" wallet.
I'd suggest to copy the wallet file (
location in the post above, same name as what you can see in the title bar of Electrum)
so your labels, contacts and other info that's not backup by the seed will be copied as well, then replace (
or delete) the watch-only wallet so it wont cause you problems in the future