Network adapter 802.11ac WiFi lag spikes then disconnects.

From a CMD window with administrative rights, post the output of

NetSh WLAN Show All

See https://support.microsoft.com/en-us/windows/analyze-the-wireless-network-report-76da0daa-1db2-6049-d154-7bb679eb03ed for reference.

The output can be long. You can use the text box in the bottom of the Reply box to attach the text.

Can you Identify your MacBook Pro model - Apple Support exactly?

Run broadcomwirelesswin8x64.exe and check the version in Windows Device Manager. If it shows the .68 version, test and verify.

If you still see 7.77.x driver, you should update the driver manually. For manual update, right-click on the Broadcom adapter, on the Driver tab, select Update Driver -> Have Disk and point to broadcomwirelesswin8x64.exe file.

• You will need to uninstall and remove the 7.77 driver
• Use pnputil to remove it from DRV store
• Install the .68 driver
• Use https://support.microsoft.com/en-us/topic/how-to-stop-windows-7-automatically-installing-drivers-11ed3ddc-83a0-ffd4-2f37-f21cd8d4b7d5 to disable any further updates if the .68 driver works properly.

Your Windows automatically decides which one to pick. Based on the output you posted

SSID 5 : Bman

    Network type            : Infrastructure

    Authentication          : WPA2-Personal

    Encryption              : CCMP

    BSSID 1                 : 98:9d:5d:1b:ca:91

         Signal             : 85%

         Radio type         : 802.11n

         Channel            : 6

         Basic rates (Mbps) : 6

         Other rates (Mbps) : 9 12 18 24 36 48 54

    BSSID 2                 : 98:9d:5d:1b:ca:99

         Signal             : 80%

         Radio type         : 802.11ac

         Channel            : 157

         Basic rates (Mbps) : 6

         Other rates (Mbps) : 9 12 18 24 36 48 54

the Windows installation is picking up what it considers the optimal radio. .11ac offers better throughput than .11n.

To force the use of .11n,

• you will need to turn off .11ac on the gateway, or,
• move farther away from the access point, which attenuates the .11ac and forces the Mac to switch to .11n.

If you click on Windows Device Manager -> 802.11ac adapter, and click on Driver tab, do you have an option to 'Rollback driver'? If yes, what are the available versions.

You can try to re-install the original Bootcamp driver, but Windows may force you to update the current version again. See Download and install Windows support software on your Mac - Apple Support for reference.

Right-click on the 802.11ac adapter, click on the Driver tab, and click on Uninstall. Also, see https://docs.microsoft.com/en-us/windows-hardware/drivers/install/using-device-manager-to-uninstall-devices-and-driver-packages for reference.

Zexedbtw wrote:

Also when I uninstall it It says warning you are about to delete this device from ur system.

It will come back when the older driver is re-installed.

But it also gives me an option to delete the driver software for this device. Do I do that?

Yes, please.

You will need to use Brigadier (https://github.com/timsutton/brigadier)?

Once you boot into Windows, install the .68 driver and test if your .11ac connection is better, before we go further. I personally do not like the 7.77 drivers.

Zexedbtw wrote:

I tried /delete-driver and it said “delete-driver is not recognized as and internal or external, operable program or batch file.

Try

pnputil /delete-driver oem9.inf

In Windows, run CMD with Administrative rights. pnputil.exe is a command line utility. See the /delete-driver qualifier in https://docs.microsoft.com/en-us/windows-hardware/drivers/devtest/pnputil-command-syntax.

In Windows Device Manager -> Network Adapters -> Broadcom 802.11ac -> Properties -> Events, you should see the name of the INF.

This INF file exists in

Before you use pnputil, ensure that you have access to the file and you can see it.

Here you go I had to make a new account for my laptop