Glad you got it fixed.

Since this occurred after the dual boot, you used a great troubleshooting inquiry - What Changed?
Nicely done.

Hmm, I wonder if this was somehow related to DHCP.
If you have any info on what the Windows wifi driver fixed, it would be appreciated.

If not, that's OK. We really appreciate you updating the thread with the resolution !
Thanks and all the best,
Tim

Basically, when I initially downloaded extra xubuntu updates from the first launch, it knocked out my internet drivers for windows.
I had to figure out which motherboard I actually had because I always thought I ordered BIOSTAR, but turns out it was Asus, so definitely know the model of your motherboard.
Once you know the model of the motherboard, if you have another computer in the home and a USB flash drive with some free space, Install the windows wifi driver for your motherboard.
Once you install it, perform a restart and you should have it back.

Earlier, I said have a usb flash drive or some other thing to transfer the files to the computer without internet.