Unstable WIFI on Ubuntu, not Windows.

Hello. I have a dual boot with Windows 10 and Ubuntu 16.04. My router uses DHCP. I don't have any coection problems on Windows.
On Ubuntu, however, I sometimes have Inteet access, other times I don't. I usually get redirected to 192.168.0.1 when I use a web browser.
Sometimes the coection drops and the WIFI coections on the Network Manager disappear. The Network Manager shows "Wifi device not ready".
The same happens if I discoect from my WIFI coection. I have to restart the Network Manager to make the WIFI coections reappear.
One time it crashed completely, with the icon disappearing and a message showing:

Ubuntu has experienced an inteal error.
ExecutablePath
usr/bin/NetworkManager

Rebooting doesn't seem to bring the coection back, it's just random.
Sometimes I start having coection problems after a couple of minutes of using Ubuntu; other times I don't have any problems for hours, but there's not a single day where these appear.

Any help would be appreciated.