Yes it will update. If however Win 7 does not validate after the time allocated then certain updates will not work. 3 days is unusual. I assume you mean 30 days?
I already went to activate online and by phone and it says key is not valid,however I;m up and running win 7 pro, however this is a system builders disk used on several systems
... however this is a system builders disk used on several systems
That's your issue.
Each Windows 7 install disc can only be used to install Windows 7 on a single computer. If you have multiple computers, then you need to purchase multiple install disc whether they be OEM (System Builder) or Retail.
If Windows 7 is validated on all those other computer using the same install disc, then i don't know how you managed to do that.
What is the difference between the OEM, and the Retail version of Windows 7?
There are 3 major differences between these 2 items. The physical DVD disks themselves contain exactly the same content.
1. OEM copies of Windows 7 come in either 32, or 64 bit flavors. You must decide which version you want, and make sure you purchase that copy. With a retail copy, you get both 32 and 64 bit Windows 7 DVD’s in the same box.
2. OEM copies cannot be transferred from one PC to another. Once you install an OEM copy of Windows 7 on a PC it must remain with that PC forever, unless upgraded to a newer version of Windows in the future. Retail versions can be moved from PC to PC, but your retail copy of Windows 7 cannot be installed on more than one PC at any given time.
3. OEM copies do not come with any support from Microsoft. If you need to call Microsoft for support with Windows 7, you must pay a fee to do so. Retail copies come with a phone support incident included in the price.
okay this is to everyone from the novist to the seasoned pro, I've used this same disk on 4 computers without issue {successful activation} on them all, windows allows you some margin of error on system builders disks for faulty hard drive etc.......