I'm not totally sure if I know what I'm talking about, but I'm going to try my best.
I've got Mint installed on a desktop, and when Iwas on windows I had to use a wireless adapter to connect to the internet, and it had a disc that came with it that installed a program that let me connect to the internet.
Now that I've got Mint installed, I've noticed some changes in my wireless. For one it doesn't seem to need the program to connect to the wireless, it just connects automatically (unless I unplug the adapter from the back of my computer). And there have been some problems, like WiFi disconnecting A LOT (requiring me to pull the adapter and plug it back in) and way way slower download speeds. I'm used to having pretty slow speeds because of this adapter, but 20-50 kb/s is pretty ridiculous.
Any help would be greatly appreciated