Strange issue with Activation

When I installed Win7 RTM, I also ran a utility to display my Motherboard MFG (Asus) in the System window. No biggie, I never ran or used any cracks.
Last month, I ran the update issued to verify activation and product keys.
I expected it to fail, it did. It began asking me for a valid product key.
So, I ran the rearm (first time) option.
The screen says I am activated and I am receiving updates.
Two weeks later, I purchased the Ultimate (retail) package from a local store.
I was expecting Windows to tell me after 30 days to enter a product key or I would have to rearm.
This has not happened yet.
Is there another way to enter the new product key in Windows 7?

I can get to that screen by right clicking Start/Computer, and selecting Properties.
It states Windows is currently activated, and does not give me the option to enter my new product key.
Should I just leave it alone until it decides it wants a new product key?

You can also input the new key manually.

Run CMD as administrator, then at the command prompt, type the following;

slmgr -ipk <key>

This will install the new key and swap out the old one.

To activate windows after installing your new key type:

slmgr -ato

To check activation status, type:

slmgr -dli

(long version)

uninstall the product key:
slmgr /upk

Restart and change the product key from the change product key button at the bottom of the system properties page.

Reinstall a new product key:
slmgr /ipk [product key without dashes]

If you still have the message that windows is not genuine:
validate the windows here:

www.microsoft.com/genuine/validate

after a successful validation, restart the computer and the message will be gone.

(short version)

You can also update the product key here:
http://go.microsoft.com/fwlink/?linkid=45668

Bill2 said:

You can also input the new key manually.
Run CMD as administrator, then at the command prompt, type the following;
slmgr -ipk <key>
This will install the new key and swap out the old one.
To activate windows after installing your new key type:
slmgr -ato
To check activation status, type:
slmgr -dli

This worked perfectly.

Thank you.