Forgive me but there seems to be some misinformation here :

Quote: "Hey what if one has a key like: XXXXX-OEM-0044283-XXXXX ? Is it possible to generate with what we have?
I mean for instance, one has a 100% legit Copy of Windows XP Pro on the original CD even for good measure . The user installs this copy once, twice, OOOPS! Third time's a charm meaning Windows demands activation because as we've discussed, either things have changed "inside" the PC, or the copy has been installed "too many times during a predefined period of M$ time". Now what. Does there exist the possiblity to actually activate the damn thing with a key created by the 4in1 keygen (a key that falls completely out of the banned range)?
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If You have a legit copy you can Install it any number of times since no one can predict when , how and which App can crash the system or what hardware fails.

Every time You Install you have 30 day grace period for activating it. You can simply keep installing every 30 days without ever activating it.

Win updates are mostly Patches for Internet Explorers new found vulnerabilities . One can live without them - for 30 days !

You can activate 3 times on the Internet within 120 days after which the counter goes zero . If you install more than 3 times you have to call MS on Phone to get the activation code . Hassle but they will give You code to activate it . One Guy installed 27 times within a week and gave them no reason what so ever . He got the activation code on the phone , informing the operator that the conversation was being recorded !!

I too have a OEM legit copy .

Some info from MS help and support site :

If you have a Retail Copy of OS you can Activate it but need not Register it . You can sell your copy of OS and remove it from your system.

You can not sell your OEM copy of OS ! It is locked to your computer !! You also have to Register it else it does not get Activated . I find if I do not click on the Register Button the Activate Button stays ' grayed ' out .

Locked to my computer ?

I am allowed to replace and change every component , motherboard , Hard drives , cards , Ram , PSU , case , name and designation of computer , number of users . It isn't locked to any thing in the system .

What if I move few blocks and my IP changes ? What if move to different country ? Surely if you install on a laptop and it crashes in Timbuktu , you need to reinstall and get it activated .

Unanswered questions but I think it is locked to my registration to me which can not change .