When was the wallet file created? If your old computer was running Windows, that information is saved in the file properties. It'll give us an approximation of what version of Core you were using.

Do you remember whether it was a long or short password? Did it have numbers in it or at the end? Did you string words together into a passphrase? Did you only use lowercase characters inside the password?

Try to remember what kind of password it was, because a little hint can go a long way to recovery, by reducing the search space for the password by a large factor.