Error Code 1603 When Installing Updates for Excel
- 1). Double-click the "My Computer" icon from your desktop and then right-click on the "C:" drive. Click the "Properties" option.
- 2). Select the "Security" tab and then verify that the system user account appears in the "Group Or User Names" box.
- 3). Click the "Add" button and then click the "System" option in the "Name" field. Click the "Add" button again and then click the "OK" button.
- 4). Click the box next to the "Full Control" field in the "Permissions" section so that it's selected. Click the "Advanced" option.
- 5). Select the box next to the "Replace Permission Entries On All Child Objects With Entries Shown Here That Apply To Child Objects" field so that it's selected. Click the "OK" button and you will then be able to install the updates you need for Excel with the Windows Updater.