The Windows Operating System developed by Microsoft Corporation, has many devices inbuilt to handle various functions. Installation of a software or program requires the Windows Installer. And when it encounters any issue, it shows an error message just like any other software on the system. Error 1601 is actually a Windows Installer error that can occur when you are installing software programs on your computer. This particular error code pops up or appears when a program you are trying to install is not able to access the Windows installer service on your system. Actually, Windows Installer service is very much necessary for installing any software application, and when this error occurs, it can mean that the service is in use by another program. In case, you are running an older version of Windows, then this error can also mean that the executable is corrupted or it is out-of-date. It is possible for you to fix this problem by ensuring that no other software is using the Windows In...