When the radio of the client network adapter turns on, the client network adapter then communicates with the AP to retrieve the buffered packets. The wireless AP then buffers packets that are destined for the client network adapter. When the wireless AP receives the frames that have the power save option set, the wireless AP determines that the client network adapter that sent the frames wants to enter a power saving state. In this scenario, the following behavior should occur: The adapter does this by setting the power save option in its packets or in the 802.11 frames that it sends to the wireless AP. When an 802.11 wireless network adapter that is set to use power save mode wants to enter a sleep state, the adapter indicates this intention to the wireless AP. When the mobile PC is running on battery power, the wireless network adapter is configured to use Medium Power Saving mode. When the mobile PC is plugged into a power source, the wireless network adapter is configured to use Maximum Performance mode. The following is true for mobile PCs that are configured to use the Balanced power plan: The default power plan that Windows uses for a mobile PC is the Balanced power plan. This issue occurs because of the power saving features that are included in Windows. This issue occurs if the Wi-Fi hot spot uses wireless APs or routers that do not support the 802.11 power save protocol. Note You may also experience these issues when you connect a Windows-based mobile PC to a wireless access point (AP) in a small office/home office (SOHO) environment or in an enterprise environment. You experience these issues if the computer is running on battery power. The wireless network connection is dropped. You may experience random connectivity issues when you connect a Windows-based mobile PC to certain Wi-Fi 'hot spots.' These connectivity issues include the following: Windows Vista Ultimate Windows Vista Enterprise Windows Vista Business Windows Vista Home Premium Windows Vista Home Basic Windows Vista Starter Windows Vista Enterprise 64-bit Edition Windows Vista Home Basic 64-bit Edition Windows Vista Home Premium 64-bit Edition Windows Vista Ultimate 64-bit Edition Windows 7 Enterprise Windows 7 Enterprise N Windows 7 Home Basic Windows 7 Home Premium Windows 7 Professional Windows 7 Professional N Windows 7 Starter Windows 7 Starter N Windows 7 Ultimate Windows 7 Ultimate N Windows 8 Windows 8 Pro Windows 8 Enterprise Windows 8.1 Windows 8.1 Pro Windows 8.1 Enterprise More.

Windows 7 turn on wireless capability