Hi Jriv,
reimage process, by design, preserves BES client identity. This is a goal of the reimage process. You will have at the end a new OS, but with the same bigfix client. If you want to have a new fresh installation with a new client ID, you should exploit bare metal deployment, but in your scenario (computers at home), I don’t see it as feasible. Network configuration can be a show stopper.
Regards