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#21
well for me what I did to reappear my wifi and the wireless connection was I have uninstall wifi adapters(Broadcom Netlink & USB wireless lan card) after you have done this , now go to "Troubleshooting" and find and click "Hardware and Sound". Now if you look down you'll find "Hardware and Devices" and click that and now you go do all the rest. Restart your computer after you have complete the troubleshooting.
check this out Fix wifi connection problems
I recommend you to use USB Wifi adapter. When you upgrade your windows to windows10. Internet connectivity issues occurs. So, you have better option is to use Windows 10 compatible USB Wifi adapters. It is easily install on windows 10 and your problem will be solved.