Acer Aspire 7745 Notebook (purchased 10/25/2010) Win 7 HP 64-bit (build 7600) (last update 11/11/2010) Broadcom 802.11n Wireless Adapter (18.104.22.168) Since the last update, the wireless network keeps dropping its connection randomly. Windows Network Diagnostics says it can't connect. Status shows limited connection. Manual disconnect and re-connect says "Not in range" although it shows in the available networks with strong signal. Disable and re-enable causes the entire system to lock up and I have to power down. The only reliable way to reestablish a connection is to reboot or wait some random amount of time until the system decides to recognize the wireless network again.