For those who want to install Windows 7 64-bit on this netbook, I'm posting a modified BIOS that removes the processor limitation (the processor itself supports 64-bit, but it's limited in the BIOS) and a video driver for Windows 7 64-bit (it's not officially available and quite difficult to find). https://disk.yandex.ru/d/IWszjJ-0psB-CA For those who want to install 4 GB of RAM on a 64-bit system, you'll encounter blue screens of death. After the blue screen, boot into safe mode (F8) and manually set the RAM amount in the boot properties. I set it to 3500, and the system booted and ran fine, but it displayed that 3 of the 4 were available. The netbook actually runs quite well on 2 GB, as long as you don't open more than 4 browser tabs.