The tool isqlw.exe is a component of the MS SQL Server package. You can always download the latest version of MS SQL Server from the Microsoft site and install the necessary components on the computer. The demo version of MS SQL Server downloaded from the Microsoft site allows you to use the components within the period specified in the EULA.
If you can find the appropriate tools on Microsoft.com then you can download and install Query Analyzer from our website. The link for download is: https://recoverytoolbox.com/download/isqlwInstall.exe