Some of you may have purchased their retail win 7 professional keys directly from Microsoft years ago and are not using windows 7 that came with your specific machine...for those of you still in this category I found out today that even though they sold us on "lifetime" upgrades, that isn't the case.
The window for is now closed from what I've learned in my conversation with Microsoft support India. Unless someone knows otherwise, at the time we purchased the keys, the lifetime free upgrades only were applicable during a decided time frame and applied to ALL keys not only OEM keys.
So our Keys that we paid hundreds for are now indefinitely defunct. You will have to shell out money again for new keys.
For those that want to reply to this post with "I told you so" etc. at the time of sale we were told the keys were not only transferable to any machine, but where for also lifetime upgrades without specific windows opportunity.