Hi
I have recently got a similar spec Acer, the drive is just not large enough to run anything without getting warnings even jmri,
I took a leap of faith and installed linux xubuntu, took a bit of learning with a few issues along the way mainly to do with the cheap way acer had the bios set up but I now have a nice little machine for running JMRI with 2/3rds of the memory and Ram available.
Alexander