I have a friend who was using an Intel CPU before, and now the PC is old and he wants to change it to AMD, the confusion is if the hard disk that consists of the nodes and wallets will also run well on the new AMD machine.
If anyone has gone through this before can you please share your experience? Any smooth result or glitches?
It will work.
It's simple, you have two option: Run your node from the old drive or copy your old wallet.dat and run from the new PC.
If you want to run it from the old drive, you have to remove the drive from your old PC, get an external case with a USB cable, couple it together with the drive and connect it to your new PC, then install new Bitcoin core on your PC and run your node from the old drive, make sure you do a custom directory to external drive so the Bitcoin core will locate the Bitcoin folder.
Secondly, run everything from your new PC. It will cost you nothing much to download new Bitcoin core and initial block download on your new PC, install new Bitcoin core and sync it from beginning to the latest block. Copy your old wallet.dat from your old PC to your Bitcoin folder on your new PC and you are good.
Incase you find it hard to locate Bitcoin folder on your old PC, it's always within AppData if you use default custom directory on your Bitcoin core. Make sure you checked "hidden items" in case the AppData folder is hidden.
I'm not sure about the Altcoins wallet but your wallet seed phrase should help you recover everything you have on your wallet from your old PC.