Windows 7 - upgrading need help

i want to buy a Intel i5 2500k and ram GSkill 4GB (2x2GB) now can i upgrade to Intel i7 2600k core &RAM 8GB (2x4GB) later on down the line? and for that matter the mb and VGA? thank you

I'm not sure what you are asking. You can upgrade to anything you want, at any time. The first part of your question is a yes. You could swap out the 2500K and 4 GB for a 2600K and 8 GB. However, why waste the money going from a 2500K to a 2600K? You won't see a difference.

Later on, you could upgrade the motherboard and video card, as long as they were compatible with your current proc and memory.

i think you are aking whether you will need a new motherboard in the future if you want to upgrade your i5 to i7.

the answer is no - your motherboard will be able to take a better i7 cpu in the future, and a better gpu and more ram.

however, you may need a better power supply, as faster components generally need more power.

(by the way, i recently made a very similar upgrade, going from an e8400 to an i5 2500k - and noticed a BIG difference. )