Yes this has been a major problem for me as I use my Phone WiFi to use internet and it's a Ad-Hoc Network. Somehow my Wifi Dongle from "D-Link" is able to detect and connect to any Ad-Hoc network. This wnot possible with the in-built wireless lan in the
Earlier I had tried the longer route through CMD mentioned in the chains of responses here, but the WiFi network used to drop put very frequently. So I sticked with the WiFi Dongle solution instead.
Recently, I again tried to connect to the Ad-Hoc network hoping that some recent Windows Patch would have fixed the problem. Alas the same "Exclamation Mark" in the taskbar, saying I have limited connection and no link to Internet. Then I ran Network Diagnostics
on the same to see if that brings out something new. The result was a message saying "DHCP not enabled for your <Wireless LAN Name>". I let the Diagnostic Tool do an autofix and "Mama Mia", no exclamation mark!!!!!, I am connected to the Internet now.
I tried restarting and reconnecting and it works fine now.
Let me know if this works for everyone.
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