richms: Crappy old first gen core i7 machines are still usable for many things since the demands have not gone up massivly since they were new. Anything older than that will not be any use when upgraded. A low spec machine now has about the same ram and storage as one from 5 years ago, so upgrading wouldnt help that out at all.
Off the repair track.. a standard motherboard form factor would allow a side-grade to a modern low power mobile processor with efficient multimedia extensions.