Error 1723 is a common problem when update Java on the windows computers. The cause of the problem is corrupted files or registry keys which prevent to read a vital DLL file which requires for the installation. It can easily fix by removing the old version of Java but at times you may see the same error when you try to uninstall the old version of Java.
To fix this problem follow the steps
1. Download and Run Microsoft Fix, it will help to resolves problems that prevent programs from being completely uninstalled and blocking new installations and updates