|"E-systems" is an oddball. People have asked about them before but there seems to be very little information avaialble about them. It appears that these systems were sold in the UK at PC World? And they sem to be cross referenced with DIXONSXP & ADVENT. All I know for sure is that they are NOT affiliated with eMachines.|
Your best bet would be to unplug the power cord, open the case & see which upgrade slots are available on your motherboard. And if you can find a make/model number on the motherboard, even better. And check the label on the side of the power supply while you have the case open. Record the make/model, wattage & amperage specs on the major voltage rails (+3.3v, +5v, +12v).