XPS 8900 constant problem-having to reset network adapter card

This computer is about four months old having been bought new from Costco. Almost from the get-go, I'd intermittently see the wifi icon at the bottom of the screen with a yellow triangle covering part of it indicating no internet connection. Through using "troubleshooter", the network adapter card was reset, and internet connection established. I've been in contact with Dell Support, and they've worked with me to try to stop the problem. BTW, they were great. However, the problem persists. I know it's just a matter of starting "troubleshooter" to resolve the problem, but various people use the computer and its impractical for me to instruct them when and how to use "troubleshooter". It would be best if the problem would just not occur. I'm very disappointed with this problem. Any help would be appreciated.