Thanks for the response.
We have tried both of these options; the virtual repair tool just gets "stuck" at the step of resetting the modem. I've tried this twice, and my wife tried it while on the phone with a Virgin rep. No luck. Also factory reset, but no luck there either.
Then things got worse!! it was now tripping out every 5-10 minutes. Unacceptable for my wife who works from home. She spent another 2 hours on the phone trying various things. The rep couldn't figure it out. Suggested we "upgrade to a higher speed" to fix. Which we reluctantly did (I say reluctantly because I don't think that was the issue).
And... we were right. Now at 300mb download speed, still tripping out. 3rd (and final) call to Virgin, my wife insisted they do something immediately or we are canceling. The rep (again) tried various tests, but agreed that she can't figure out the issue, and is sending a new Valerie Modem by Monday.
...Last chance, or we are taking our internet and mobile business elsewhere. Can't work like this.