連接狀態檢測原理
復制從:https://superuser.com/questions/277923/how-does-windows-know-whether-it-has-internet-access-or-if-a-wi-fi-connection-re
Here are the details of the connection status determination process:
The following list describes how NCSI might communicate with a Web site to determine whether a network has Internet connectivity:
A request for DNS name resolution of
dns.msftncsi.comA HTTP request for
http://www.msftncsi.com/ncsi.txtreturning 200 OK and the textMicrosoft NCSI
This can be disabled with a registry setting. If you set
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
NlaSvc\Parameters\Internet\EnableActiveProbing
to 0, Windows will no longer probe for internet connectivity.
Apple does something very similar in iOS to detect internet connectivity and possible hotel "login" wifi pages, etc.
解決辦法:
計算機\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NlaSvc\Parameters\Internet\EnableActiveProbing 改為0 禁用檢測
##############################################################20210706
上面的不起作用
計算機\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NlaSvc\Parameters\Internet\EnableActiveProbing 改為1
參考 :https://docs.microsoft.com/en-us/answers/questions/122033/win-10-version-2004-no-internet-connection-but-can.html
The following registry entries worked for me immediately, and retain after multiple reboots. Even if there are no values present under the NetworkConnectivityStatusIndicator Key, add the one shown below and see if it helps.
Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NlaSvc\Parameters\Internet
Type: DWORD
Value: EnableActiveProbing
Data: 1
Key: HKLM\Software\Policies\Microsoft\Windows\NetworkConnectivityStatusIndicator
Type: DWORD
Value: NoActiveProbe
Data: 0
If issues persist, I recommend wiping and reloading the OS w/ 2004 or 20H2 (whichever is your preference). An In-Place Upgrade will not resolve this issue.
以上方法都不管用 每次重啟網卡吧
netsh interface set interface 以太網 disable netsh interface set interface 以太網 enable