You will have access to all the features for 30 days before it turns into a subset of features. Then (or before then) you will have to 'activate' it again, because MS will detect that you are using an OEM license on a different computer when you go to get updates. There is a 50-50 chance you will be able to re-activate with no issues. if not, you will have to call a toll-free automated phone activation system. At that point you will be asked a couple questions and it will be another 50-50 chance you will be given a new license for that copy. If not, you will be directed to a rep who will ask why you want to use a OEM license on another machine. Get creative if it comes to that.