New
#11
As to the OP's original question, the Atom processor used in the AOA150 can only address a max of 2G RAM but for whatever reason Acer decided to limit the netbook to a max of 1.5G. I have an AOA150 that has been happily running Win 7 Pro for several years with 1.5G of RAM and ran Win 7 previously before that with 1G of RAM so can verify that your BSOD's are not caused by insufficient RAM.
Insufficient RAM would be indicated by extremely poor performance and high disk activity as the OS attempted to swap parts of memory to disk in order to compensate for the lack of physical RAM.