hi i have a question i am looking at getting the oem version 64 bit windows 7 .my question is once you install it and say dow the the line you have to reformat will it let you reinstall again ? i heard that it takes an image of the components you have installed .lets say down the line you add a new hard drive or something and you have to reinstall windows what problems are there? do you have to call microsoft for a license key or what? would hate to have to pay extra 100 dollars for retail.
