I've a similar eMachine but am running Windows 7 x64 with an AMD dual core (harvested from a Dell or HP along the line). Very stable and fast. Like it a lot and usually off-line.
Also put a PCIe video card of some sort, upgraded the PSU, RAM, added a couple HDDs, BlueRay and an SSD. When I replaced the battery: I tightened the bolts that anchor motherboard to case as they (loose connections) can cause issues or burn-out. A salvage machine that is control-center.
Would like to spend more time on it but it eats too much electricity and puts me in seclusion (office) which I don't care for. Have some decent laptops so can be closer to loved one and still be half-***** productive.
These machines are very simple and changing the battry will afford no obstacle (besides maybe disconnecting and reconnecting cables and/or ribbons) to reach the coin-size bugger.
Edited by bludgard, 16 May 2016 - 08:47 PM.