Can't connect to WiFi on Dell XPS Studio 1640

I implemented your suggestion, removed the adapter, and cleaned the contacts, but the problem still remains. I talked with a Microsoft Tech yesterday who thought that the most recent edition of Windows 10 was the problem. Apparently Microsoft has been having compatibility issues with Windows 10 (the newer versions), and is addressing the issue. The tech downloaded an older version of Windows 10 thinking that may solve the problem, but it didn't.
I have another phone call scheduled Monday morning to see if if the older version has solved the problem, if not, he said theirs one more thing that he can try. So, we'll see what happens Monday morning.
I did mention to him that even though it did work with the older version, future updates would bring it up to the newer version and present the same problem, but he said by that time, Microsoft should have a handle on it. Anyway, in my case, specific versions do not seem to be the problem.

Update.
I removed the WiFi Link 5100 adapter and cleaned the contacts as suggested, but no luck.
Microsoft Tech had me install an earlier version of Windows 10. After doing so, I also lost Bluetooth capabilities.
They then had me install Windows 7 to get the original drivers back, but still no Wi Fi and Bluetooth.
Their idea is to fix the problem with Windows 7 then work back up the line to Windows 10
I did get an Ethernet cable and was able to get online.
I was able to download a driver for Bluetooth, which is now working, but Wi Fi is still out.
I have another call-back on Thursday with Microsoft, so we'll see what happens

I'm really due for a computer upgrade, (I'm into video), but at this point, Windows 10 is not giving me much encouragement. I'm also led to believe that Apple is moving away from video production, remaining with the ATI Radeon Graphcs Card line, and dropping the Navida Graphics card lineup, (which Adope embraces), so I'm not sure where I'll end up, lol.

Hi there,

I have exactly the same problem with my Wi-Fi network. Did you find a solution for that?

I wasn’t able to solve the problem. I ended up buying a wifi and bluetooth USB adapter which works great. The only caveat is that both USB ports are being used at the same time, so when uploading or downloading something, I have to remove one of them.