After installing Lr (Desktop-Version) the programm does not start. Immedeately after double-clicking the Lr Button an error message appears on the screen: Lightroom.exe system error VC Runtime 140_1.dll not found. Deleting the programm and re-installing it did not help.
Sorry that you're getting an error Lightroom.exe VC Runtime 140_1.dll while launching Lightroom Desktop.
Would you mind checking the below steps and let us know if that helps?
Click this link: https://support.microsoft.com/en-gb/help/2977003/the-latest-supported-visual-c-downloads
Under the Visual Studio 2015, 2017 and 2019 section on this page, download the following executable file:x64: vc_redist.x64.exeRun the downloaded executable file.Restart your computer.Launch Lightroom...