Chosen Solution

I would like to know if the RAM (Random Access Memory) on the Acer Aspire One D225E upgradeable.

The RAM (Random Access Memory) on the Acer Aspire One D225E is upgradeable, but only supports a single 2GB RAM module. Please note there is only one RAM slot on the D225E and supports up to 2GB of RAM only. Refer to the following link for troubleshooting information: Acer Aspire One D255E Troubleshooting

just be careful what specifications you search for.. this worked for me: PC3-10600s 1333Mhz CL9 DDR3 1Rx8 Unbuffered Non ECC 240 Pin SO DIMM