I'll check for any trial/bloatware programs and revert.

I share similar suspicion with nihil. Under Network Adapters in Device Manager I have following 3 branches:

1. Atheros AR5B97 Wireless Network Adapter
2. Broadcom Netlink (TM) Gigabit Ethernet, and
3. Microsoft Virtual WiFi Miniport Adapter

I'll see updates for each on google and check if problem is fixed.