OEGStone laptops

3 models from 5 hardware reports. 3 of them have a memory slot you can fill.

C41001
W541
M5701

Most reported models 3

ModelSeriesMemoryMost seenUpgradeReports
C4100-C5100 C4100 2+ DDR3 SO-DIMM slots 3 GB 3
W54 55SU1,SUW W54 2+ DDR3 SO-DIMM slots 8 GB 1
M570RU M570 2 DDR2 SO-DIMM slots 4 GB 1