still using same as factory configuration.intel core 2 duo processor e7200 2.53 Ghz,1066FSB,3mb
current ram is2gb = necc dual channelddr2 800 mhz sd ram (2*1)
250 gb sata 3 gb/s with native command.
1.how much ram can add without changing processor?
2.does with addition of ram ,new bios can i add windows 10 os?
3.what more graphic enhancement can be used if not altering original confign.