What's more, I had replaced the battery with an after market 9-cell battery but under Windows 10 the system kept shutting off.

After a bit of research the solution was either re-paste the processor or something to do with power tools thinking the battery was dead.

Since moving to Linux, the computer hasn't repeated this weird behaviour.

Essentially, what this has done is make this thirteen year old laptop usable, almost feels brand new.

Honestly, my work provided mac feels slower than this machine does right now!