1GB RAM on my desktop (XP) 1.5 GB on my laptop (XP) 256MB on my mess about desktop (has windows 7 atm)
I've got 2GB RAM. Should suffice I've was told that , due to the fact Windows XP is a 32-bit operating system, there is no point upgrading further than 2GB. Apparently you wouldn't see the benefit, unless i migrated to Vista.