1. The drivers on the CD are OLD and outdated
2. Win 10 is so much better than Win 7, it is more secure
3. Win 7 is no longer supported, although one of the best O/S MS put out, you can no longer get security updates
4. What was it about Win 10 you didn't like? You can make Win 10 look just like Win 7
https://winaero.com/blog/get-windows...or-windows-10/
5. Internet speed has nothing to due with the motherboard, as said a motherboard issue would be the same in Win 10 as Win 7
6. Internet speed is dependent on several factors;
- Hardware- Modem, Router, Cable
- Viruses
- Software you run
- Number of Users
- WiFi vs Lan
MSI site list the latest Lan driver as version 1.1.65.1138 2017-01-03 for Windows 10
https://us.msi.com/Motherboard/suppo...ver&Win10%2064
It also list the same driver for Windows 7
Have you tried this driver? You indicated you got the latest drivers from MSI?