I have a Compaq Pressario CQ-50 NR-103 which came with Windows Vista Basic pre-installed. It also only came with 1GB of memory.
I have since upgraded to Windows 7 Home Premium and upgraded the memory to 4GB (the maximum recommended by HP for that model). It seems to be getting hotter sooner, but the machine is also a couple of years older.
Would upgrading the RAM cause the machine to run hotter?