have you replaced the new wallet created on the new pc with the old wallet from the old PC.
usually if you have replaced the wallet while bitcoin-core is open, it wont show new addresses. you may have to close then reopen (ensuring bitcoin-core is not in task manager inbetween (fully closed)
do you still have access to the old PC to manually (pen and paper) write out the private keys to then manually put into the new PC.
Hi thanks for the reply, yes I replaced the new wallet with my old one (from the old PC) before I started downloading the blockchain. (then did a -rescan).
It has given me all of my bitcoins. I have not lost any. But only 1 receiving address shows up now (a new one) that I have not used before.
It's strange that my regular receiving address has disappeared but my bitcoins are still there.
For a test I sent a bitcoin to the address I have always used. It says "payment to yourself" in my transaction history. But I didn't receive the test amount