That system will run Windows Vista and hence will run Windows 7 perfectly - anything that runs Vista will run Windows 7 better. Although not officially supported by Dell it will probably also run Windows 8. I assume from your description your processor is the Intel® Core™2 Duo Processor E4500 and if so it will run the 64 bit version. Your graphics card (there is a nVidea Driver here) should also support Windows 8 64 bit. There should be very little compromise in your gaming graphics by upgrading the Operating System.   A user has reported theirs to run Windows 8 64 bit on their Inspiron 530 fine (after a clean install): [URL]
Hi,I have lost my DELL windows xp cd and need it to reformat my pc urgently. May I know is it possible that I rebuy the cd from DELL?
Lost DELL Windows XP Home edition CD