Inspiron 3520 and Windows 10 "upgrade."

What wireless card do you have? What are the hardware IDs?

http://dellwindowsreinstallationguide.com/checking-hardware-ids-in-the-device-manager/

Check

Dell Wireless 1703 802.1b/g/n 2.4GHz)

Microsoft Windows 10 Home

Dell Inspiron 3520

Dell Inc. A09, 9/9/2013

UEFI

Secure boot state - On

Let me know if you need more info! And thank you.

Try to update to UEFI BIOS Revision A10:

http://downloads.dell.com/FOLDER01835854M/1/3520A10.EXE

See Updating your BIOS:

http://dellwindowsreinstallationguide.com/updating-the-bios/

https://www.youtube.com/watch?v=UpQxjpRXrjc

For the Atheros (Dell Wireless 1703) try this driver:

http://downloads.dell.com/FOLDER03113559M/1/XPS-8700_Network_Driver_33H8G_WN32_10.0.0.318_A00.EXE

I am still having the same issue with my wireless connection.  It's intermittent.  It stopped working and said "no internet" for about 6 hours yesterday, then for five minutes this morning, and now it's back.  The improvements I noticed yesterday might have had to do with the other update I performed, everything seems to be working faster, when it's working.

Other suggestions? 

````````````I am back in business.  Thank you!!  The problem was intermittent before so I hope this lasts.  I see an improvement already.  ```````````````

Also, the machine warns me that it's low on memory and to close all programs before work is lost.  I have only had internet explorer open at those times.  And then the screen goes black, but the status lights are still on and blinking.  

You might want to perform a clean installation of Windows 10 TH2. A Clean install always performs better than an upgrade install:

See video 4 and 5:

https://www.youtube.com/playlist?list=PL1RkaknDn7v-Ucth4gt0U3BHVSY7oNkWr

http://dellwindowsreinstallationguide.com/download-windows-10-oem-and-retail-iso/

Thanks.  Before I re-install, do you have an opinion on whether or not my machine is actually compatible?  I reached out because I found my machine on a list of models that is not supported by Windows 10.  Thanks!

Dell haven't tested it which doesn't mean that its not compatible. There are only two Dell models (that shipped with Windows 7 or 8) I've seen from the forums with serious issues is the XPS 14z (5423) and the XPS 2710.

I have an XPS 8300 (not supported by Dell for Windows 10), Latitude E5510 (not supported by Dell for Windows 10) and Latitude D820 (not supported by Dell for Windows 10). These 3 models are significantly older than your one.

Also the since Windows 10 was running on your machine (with only minor glitches from the upgrade/old drivers) I'd say it should work fine on a clean install.

Thank you for the help! I will try a clean install hopefully the next time it decides to connect again.