In this window, click Browse my computer for driver software.
Right-click your adapter and select Update Driver Software. Expand the branch Network Adapters and find your Wi-Fi card (Broadcom 802.11g in our example). Open the Device Manager ( devmgmt.msc). To roll back to the older version of the Wi-Fi adaptor driver in Windows 10 / 8: Most likely, the cause of the issue is an incorrect version of the new wireless drivers in the new builds of Windows 10. The option of rolling back to the previous version of the adapter helps almost in 100% of cases when the problem with a limited Wi-Fi connection for users appeared after upgrade to the next Windows 10 build, especially for the devices with Wi-Fi adapters Broadcom 802.11 and Qualcomm Atheros AR9003WB. To do it, open the command prompt with the administrator privileges and run the following commands one by one: So we recommend to disable the TCP/IP autotuning. In Windows 10, as in Windows 8.1, TCP RWIN Auto-Tuning was preserved and sometimes the TCP autotuning means conflict with the settings of network equipment or firewalls (it doesn’t support or prohibit TCP Window scaling) causing package loss and the speed of the local network or the Internet decreases or even the completely access lost. But in practice, autotuning of the Receive Window (RWIN) size results in many network issues. In theory, this one should improve the efficiency of using network bandwidth and optimize the performance of the network subsystem. In Windows Vista / Windows Server 2008 a new feature, TCP Receive Window Auto-Tuning, was introduced to dynamically resize the size of the acceptor’s memory buffer (due to this feature, the maximum size of the transfer window can be increased to 16MB). Open the properties of the wireless connection and press the Configure button.Īfter the command has been run, restart the system, connect to the Wi-Fi access point and try to access the Internet. Check if this mode is enabled in the wireless device settings. It makes Windows automatically turn off the Wi-Fi adapter if it is not used for some time to save power. Disable Power Save Mode of the Wi-Fi AdapterĪnother possible reason of Win 10/8.1 to lose the connection to the Wi-Fi access point is the incorrect settings of the Power Save Mode of your Wi-Fi adapter. Netsh wlan delete profile name=Īfter you have deleted the profile, try to connect to the access point again and specify the password. Try to delete the saved Wi-Fi network profile (as described in the post: How to Delete a Wi-Fi Network Profile). Your computer is trying to connect to the access point with old settings stored in the Windows wireless network profile. Perhaps the problem is that on the Wi-Fi router, the settings and / or the WEP/WPA2 key have simply been changed. Downgrade (Rollback) the Wi-Fi Adapter Driver. Disable Power Save Mode of the Wi-Fi Adapter.
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