The private key is a Base58 format, with uncompressed public key. The private key is a mini key with 22 characters. I bought Bitcoin in February 2009 and had forgotten what I had invested in,founded out it was Bitcoin two years ago and recovered the private key 2 months ago.

As it’s been so long there is the issue of file compatibility etc

A trusted family is going to help me with the set up but would like your advice as a guide to ensure that he is doing the right thing.

Please can you help to provide a step to step guide as to the things he should do.

The wallet was last accessed in end of 2009