Disable and Re-enable Microsoft Drivers
Open the Windows Device Manager.
Expand the Batteries section.
Right-click on the "Microsoft AC Adapter" and "Microsoft ACPI-Compliant Control Method Battery" devices and select the Disable option.
Right-click on the two devices again and select Enable.
Restart the laptop and see if the battery icon is now visible in the notification area on the taskbar.
Tip: You may not see one or both of the "Microsoft AC Adapter" and "Microsoft ACPI-Compliant Control Method Battery" devices in the Batteries section. To get both devices to show, click the Action menu at the top of the Device Manager window and select Scan for hardware changes. See if both devices are now displayed in the Batteries section.