if your OS is detect as not genuin and you just off your automatic update and disable the notification message, you can change it and validate it again and make your copy genuin.
Setp 1
find serial in www.serials.ws, or any other crack website.
make sure you copy a enterprice copy of serial, so that unlimited copy of product you can use
Setp 2
press window+r to run Registry editor, type regedit
in the registry editor window, pres ctrl+f or F3, type key word OObetimer
if the result displays, right click and modify
replace the first 2 degits of the HEX code FF to zero zero 00, to remove the current validation.
close registry editor
restart PC
Setp 3
press window+r and type the fallowing syntax
%systemroot\system32\oobe\msoobe.exe /a to validate new copy.
the activate window appear, chose activate via phone
clicke change product key
enter the Product Serial Number that you have copy in www.serials.ws
click next. if the key is accepted. restart you pc.
your product copy is now enterprise copy. and free to download microsoft update :)
Setp 4
turn off your automatic update, and let your pc updates
the end.