Updated computer now Asus PCE AC68 will not work

you "microsoft" agens need to stop reply " have you tried uninstall and reinstall", and " u have corrupted files". 

Just make asus make a new driver that fits ur new windows 10 update. Its probly over 9000000000 people having this problem after new windows updates.

The problem really lies with Broadcom and its proprietary driver.  Do you wonder what Broadcom provided ASUS so ASUS could produce a branded driver that ultimately was screwed up?  Consider that in the end, Broadcom won't directly provide to you a proper driver for their own chipset -- you have to depend on a third party to get that.  And Microsoft has a process for validating that a driver works properly with Windows -- and Broadcom isn't doing any of that dancing even though Windows is responsible for 90% of the chipset sales associated with BCM4708A/BCM4360 parts.  Of course, Broadcom probably could care less given that cellphones and tablets are the up and coming market.

As for me, I did three things after the "PCI Lock" fix didn't work:  (A) I uninstalled the AC68U and (B) installed an AC88U in its place.  I then (C) took the discarded AC68U and installed it into a Linux box running Fedora 28, where there's an open source driver which works just fine with it.

I did the Broadcom driver search at Broadcom and came up short.  I really don't think they want that driver source being handled by techies, because it would allow discovery of what are the advantages and shortcomings of the associated chipset. 

That said, good luck with the drivers you found.  I didn't take your path because of the possibility of injection of malware into the drivers by third parties.

I tried a LOT of the suggestions below, none of them fixed the disconnects.

I ended up with trying several drivers / driver versions.

I now use Broadcom 7.35.317.3 (instead of Asus drivers)

And since this driver all works fine again :)

So maybe worth a try if you experience problems after the last Windows updates.

I have also had countless issues with the Asus PCE-AC68 card since updating to builds 1709 and now 1803. It's been insane! I can however, definitely confirm that this Broadcom Driver method is a fix in the meantime. 

While the "PCI Lock" Method (msconfig/boot menu/advanced) did allow my PC to at least startup (thereby avoiding the "widifi.sys" BSOD error), however booting in PCI Lock mode prevented my wireless capability and audio from working. The PCE-AC68 card was showing in device manager, however it failed to startup (yellow error triangle/stop code 10). And strangely, all WiFi options (including the Win10Pro WiFi button) were missing altogether. At least the PCI Lock mode allowed me to startup and connect via ethernet to download the Broadcom Driver.

I could not locate Broadcom Driver 7.35.317.3 at the Broadcom Website (imagine that!). Rather, I had to download it for free from a 3rd Party Driver website. After manually installing the Broadcom 7.35.317.3 (64 Bit) driver in device manager, I then removed the ethernet cable, turned off (unchecked) PCI Lock, and then rebooted the machine. It started up perfectly, then I enabled WiFi, and now have full functionality of my PCE-AC68 wireless card. I'm connected back wirelessly at 350+ Mbps.

It's absolutely beyond RIDICULOUS that Asus and Microsoft alike continue passing the blame as to who's responsible for this miserable failure. Both companies exceed the professionals and resources to resolve what is an infuriating and widespread issue, yet they refuse to provide a legitimate remedy.

This worked for me:

Hit windows button and R.  Then type msconfig.  Go to boot tab.  then click advanced options.  then look for pci lock on the left side.  check that box.  It askes to restart.  It worked immediately.

Hey do you know if they have fixed this issue?