could be a few things , but what catches my eye is you 3.25 Ram ( win 32 systems are restricted by nature to 4gb...showing less in system info).<<
you got your game updated ? silly question i know but it could be ...sounds like an issue from an old update ..dont remeber the version.Also try to verify the compability of any mods.
Lots of em havent seen any uptade for months.
I had that issue with leaving Whiterun it was connected to the mesh incompability and as a result to all mesh altering mods that i used i had CTD.
Also you can try to verify your gamefiles...maybe the smell originates from there .
hope i could help
Good luck m8