It turned out that the mysterious website had indeed provided the correct driver for the OT-WUA600NM. Alex was thrilled to have a working wireless adapter, and his online adventures could now continue uninterrupted.
The adapter didn't work.
From that day on, Alex made sure to bookmark the website, just in case he needed to reinstall the driver or help a friend with a similar issue. And as for the OT-WUA600NM, it became his trusty sidekick, providing fast and reliable internet access whenever he needed it. 600m wireless-n mini usb adapter ot-wua600nm driver download