their modem, your modem, the babysitters modem, or even the popes modem wont really matter. It's the signal stats that do. Some modems deal better with a lower margin than others.
please locate your modems signal status page and take a few screenshots. without that, we can all guess all day long.
I guess no one went and looked, if they did, they would have noticed MS goofed on the order or something.
from the linked thread, to not be forced to enter a credit card number (like you all think is required):
Step 1. Click try free
Step 2. Click decline
Step 3. Throw away tin foil hats.
If you didnt know, the little "+Multi" quotes multiples into one post, instead of 5 different posts all at once to reply to everyone you wanted to.
Click +multi on the ones you want to quote, then click the actual Quote one when you want to start the replies.
Just to add, even tho many places will sell you a standalone OEM key, its not valid/legal/legit. OEM is meant to go with a computer, RETAIL is the stand alone key