1080p to 1440p

Good afternoon I've had my PC for close to 3 years now and have had zero issues. Since I recently got into sim racing, I bought a 1440p Ultrawide and a 2080ti, not at the same time. Ever since I changed to a 1440p monitor, random games will freeze. Games like GTAV, Apex, War Thunder, PC2...

Error message constantly says,"drivor support not working ", ? This is all the time! Please help? A dell XPS Windows 7. Than it says looking online for solution. Than never explains! I bout a online Driver Navigator to update any or missing drivers......but still get this message please help...