Out of curiosity, what driver version did the driver update utility return with? It's extremely odd you received an issue with the intel provided drivers, as even though they are "generic", meaning they haven't been customized by the OEM for a specific model of PC, intel supplied drivers are recommended over OEM versions 99.99% of the time due to the fragmentation that occurs when utilizing OEM supplied drivers.
- OEMs do not release regular updates, especially when it comes to network cards, and is the main reason why the component manufacturer's drivers are almost always recommended (applicable specifically to network drivers, as other OEM supplied drivers, such as graphics drivers, have caveats)
- Intel is easily one of the best, if not the best, component manufacturer when it comes to staying on top of driver updates and supporting their products for substantially longer than OEMs. Intel generally releases a driver update about once a month for their WiFi cards to fix bugs that have popped up here and there.
- OEMs only support a PC for a short period of time, usually around 24 months... something Dell is notorious for doing, even on their Alienware line. Once your PC's model passes the 24 month mark (not the age of your PC, but 24 months following the factory produced model), you're on borrowed time as it's likely if the OEM hasn't already stopped actively supporting your model, they will fairly shortly.
- "Actively supporting" refers not to tech support, but to whether the OEM is still releasing driver and BIOS/UEFI firmware updates for that specific model.
A quick FYI:
It is never recommended to utilize a modem/router combo as they never work properly and are more of a headache than they're worth.
It's also never recommended to utilize a router given to you by your ISP, as you forfeit your privacy.
Utilizing an ISP owned router allows them a backdoor into your local [home] network, which is there for the sole purpose of making it easier on the consumer to troubleshoot network issues. However, the problem arises with the fact that backdoor can be accessed at any time and without your permission.
Do I believe there's a conspiracy by ISPs to invade your privacy, no; however, in this day and age, with network breaches left and right on corporations housing your most sensitive data (bank accounts, CC#'s, SSN's, etc.), is it really that far fetched to believe an ISP that provides a backdoor into their customer's home networks isn't a target for hackers?
Also, I, nor you, or anyone else, knows what kind of screening and background checks, if any, are done by ISPs for employees having access to the router's backdoor. You have no idea who they are, and thus, much like you would never give a stranger on the street a key to your house, you should never give the key to your network to a faceless voice on a phone to whom you do not know.
Considering everyone houses sensitive information on their home PCs, whether it be bank statements, personal photos, research, etc., it's unwise to allow any third party unfettered remote access into your home network.