Ah thank you for the information on the battery.
The shutdown:
All temps seem fine, and whenever it shuts off the system is under no real stress at all, with only a few applications and programs running. Most of the time when it has happened is when I for instance come back to the idle system to perform a task and more than a few times when i was about to or just clicked on opening a new tab on IE.
Since yesterday I have started to use Chrome instead and I also uninstalled some programs, including Virtualbox and GNS3, and so far I have had no incident.
Previously when I had the battery in, all the lights that should show seemed on, but I have not got the battery with me at the moment to test it, sorry.
I will see how the system behave for the next week or so, but plan to do a fresh install of Windows 7.
Does anyone have a good guide for Windows 7 64bit drivers for the G750jh?
Thanks