New
#11
With W10, MS has turned activation Topsy-turvy but Retail version is still best way to go specially now when you wouldn't have to by new one for years to come. I'm already on my third MB and W10 that I got as free upgrade from W8/8.1 which was bought at time when it was greatly discounted as an upgrade from W7. All activation went thru without a hitch and W7 that I had was a gift from local MS office for some non-IT services rendered. All together, this OS has cost me about 14 bucks all told. Office 2013 was bought for me by a customer (a print shop) to do some work for them during 6 month so that payed of handsomely too.
I may be a lousy salesman but I'm great buyer. Most companies I worked for gave me open account to buy anything for maintenance and production, saved them a lot of money.