Depending on where the compass is located on the surface of the Earth the angle between true north and magnetic north, called magnetic declination can vary widely with geographic location. The local magnetic declination is given on most maps, to allow the map to be oriented with a compass parallel to true north.
2] KB2939087 recommends in case you are unable to install the Windows 8.1 Update package KB2919355 via Windows Update, then you should download and install the package manually. 3] If you receive Error 0x80071a91 when installing KB2919355 on Windows 8.1, Microsoft has released a patch to fix this issue.t should therefore first be installed on your system before your attempt to install Windows 8.1 Update or KB2919355. Go get it here if your computer does not have it. 1] If your Windows 8.1 Update has failed to installed, you need to clean up the corrupted installation.
To uninstall an unwanted Windows Update: Type âView Installed Updatesâ in the Search box and then click on View Installed Updates â Control Panel from the Search results.To uninstall the unwanted update, select it from the list and then click Uninstall.Then, to prevent the driver or update from being reinstalled, download and run the âShow or hide updatesâ troubleshooter described in KB 3073930.o uninstall the unwanted update, select it from the list and then click Uninstall. Then, to prevent the driver or update from being reinstalled, download and run the âShow or hide updatesâ troubleshooter described in KB 3073930.