Where did you upgrade the driver. It's always best to get drivers from the makers.
Lately I started to have connection problems on my laptop, and found that the same connection is good on my phone. I use Ookla's speedtest to measure both.
The connection is perfect on the phone, but on the computer it is all over the place and choppy. I restart the computer, and the connection works fine for a little while, then goes bad again. My first thought was malware.
I have Norton 360, so I ran a full scan and used the Norton Power Eraser, then I used MalwareBytes, RogueKiller and AdwCleaner. I think I'm clean, but if anyone tells me another software I should try I'd be grateful and happy to give it a shot.
I went in the Device Manager, and found that my D-Link DFE-520TX network adapter has a yellow triangle with an exclamation mark in it. The properties screen says: This device cannot start. (Code 10). I upgraded the driver but the problem, and the error message, persist.
I'd like to know if anyone can shed some light on the problem.