If I do not get microsoft support I wont be able to update windows 8 at least this is what I think. I dont mind going to other sites for updates individualy but
want to get ms updates for bugs, fixes and security. could someone help explain this to me.
As SR-71 points out, the OEM version provides "limited support".
This does NOT mean that you won't be able to get bug-fixes, security updates and the like for a properly licensed copy of Windows 8, OEM or otherwise.
It DOES mean that Microsoft does not want to hear from you should you happen to encounter a configuration issue. They expect you to go to the people/company that you purchased your OEM box from for any support of that type. So, if you purchased a copy of the OEM software from Newegg, Amazon, etc... then YOU are the person you go to for support as YOU are the OEM builder. If you aren't comfortable with that scenario, then you would probably be more at ease purchasing the "non-OEM" version of Windows 8.