Everytime I open dota I have to re-set my graphics settings. It stays set to:

Aspect Ratio - 4:3
Resolution - 1400x1050

I have to go in and set back to 16:9 - 1920x1080

also it gives me the unable to validate login or whatever message that is and I have to set my Netword quality from high to low to get this to change.

This only happens on my desktop, my laptop runs everything perfect.

I have tried re-installing dota and this did not work and I did the "view integrity of the game cache"

This mainly gets frustrating when I have to rejoin a game and set my graphics settings before I jump back in.

Any suggestions would be helpful, thanks for your time!