Wireless AC 7265 adapter stopped working due to driver digital signature error

Issue

Acer Swift SF315 wireless adapter (Intel Dual Band Wireless-AC 7265) stopped working. In Windows network settings wireless doesn't appear at all. Device manager shows the Wi-Fi adapter with an exclamation mark, and Device Status shows the following error: "Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52)"

Removing the driver didn't fix the issue. Windows was immediately re-installing the same driver with the same signature error.

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Hardware Diagnostics on Acer Swift laptop with no legacy boot mode

I recently came across a misbehaving Acer Swift SF315 laptop and wanted to run some diagnostics tools from Ultimate Boot CD. UBCD requires BIOS / legacy boot mode, but no matter where I looked, there was no option to enable legacy boot mode on this laptop. On some Acer devices, this can be done after enabling the supervisor password in BIOS, but on this device, it only allowed to disable secure boot - legacy boot mode was still nowhere to be found.

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Microsoft Exchange account stops working in Apple Mail - Enter Password

Issue

Microsoft Office 365 Exchange account stops working in Apple Mail on macOS. Apple Mail and Internet Accounts in System Preferences prompt to re-enter Microsoft Exchange account password, but after the correct password is entered, just shows spinning wheel icon indefinitely.

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TeamViewer on Mac - You are currently offline. Please check your internet connection

Issue

Mac OS version of TeamViewer 15 displays the following message in Computers & Contacts tab:

You are currently offline
Please check your internet connection.
The application is trying to reconnect

The computer is actually online and TeamViewer can connect to clients by manually entering ID and Password. It's just Computers & Contacts section that doesn't work.

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