Our company Wants to buy 30 Windows 7 Professional OEM licenses. Somebody gave us some packages like this:
How can I be sure if this Windows 7 Professional package is original?
How many users can use this Windows? He gave us for 30 clients but what happens if we install this package for more than that? How can I find the number of users that can be installed with this?
How can I check the product key before installing Windows?
That looks like a standard OEM pack. If you crack that cardboard sleeve, what you should see are the things detailed here by Microsoft as making it legit.
Microsoft's How To Tell site provides a bunch of useful information about verifying the authenticity of media. Unfortunately, there is no way to pre-verify the authenticity of the product keys, as by doing so, you are forced to open the package to find the product keys.
As I recall, these System Builder Packs contain bundles of CDs/DVDs in sleeves with individual product keys on the back, but no certificate of authenticity. That may be a bit of a pain if every disc has a different product key, but if that's what you purchased, I guess you have to work with it.
If you are buying an OEM license you will need a different key for each PC. If he is selling a 30pack (which I doubt, as I think the most you can get is a 5pack) it would have to contain 30 stickers. One sticker per PC and each one would need to be activated separately.
To legally apply the licenses you should have built the PCs yourself and be selling them on to someone else, you are not allowed to buy them and stick them on some old XP machines, for example.
He may be selling you Client Access Licences (aka CALs) which allow a PC to access resources on a Windows Server.
