Visual Studio "15" Preview

Question

I'm trying to install VS "15" Preview 5, I launched a new installer, and now it says that I need to uninstall the previous version (Preview 4). When I click the "Delete" button, the uninstall process fails, and this is an error in the log file:

2016-10-05T23:20:59 : Verbose : Getting installed product. [installerId: SetupEngine, installationId: 9554cc50, productId: Microsoft.VisualStudio.Product.Enterprise] 2016-10-05T23:20:59 : Verbose : Calling SetupEngine.Installer.UninstallProduct. [installPath: 'C:\Program Files (x86)\Microsoft Visual Studio\VS15Preview'] 2016-10-05T23:20:59 : Error : Failed to get installed product. [installerId: SetupEngine, installationId: 9554cc50, productId: Microsoft.VisualStudio.Product.Enterprise, error: Sequence contains more than one element at at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source) at Microsoft.VisualStudio.Setup.Cache.CommonExtensions.GetProduct(IInstance instance, Boolean installedOnly) at Microsoft.VisualStudio.Setup.InstalledProductsProviderService.CorrectChannelInformation(Instance instance) at Microsoft.VisualStudio.Setup.InstalledProductsProviderService.GetInstalledProductForPathImpl(String path) at Microsoft.VisualStudio.Setup.InstalledProductsProviderService.GetInstalledProductImpl(InstalledProductSummary productSummary) at Microsoft.VisualStudio.Setup.InstalledProductsProviderService.GetInstalledProduct(InstalledProductSummary productSummary)] 2016-10-05T23:20:59 : Verbose : SetupEngine.Installer.UninstallProduct reported error. [InvalidOperationException: Sequence contains more than one element at at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source) at Microsoft.VisualStudio.Setup.Cache.CommonExtensions.GetProduct(IInstance instance, Boolean installedOnly) at Microsoft.VisualStudio.Setup.Cache.CacheRepository.GetAvailablePackages() at Microsoft.VisualStudio.Setup.Engine.Initialize() at Microsoft.VisualStudio.Setup.Engine.Uninstall(CancellationToken token) at Microsoft.VisualStudio.Setup.InstallerService.UninstallProductImpl(InstalledProductSummary productSummary, TelemetryContext telemetryContext, CancellationToken cancellationToken) at Microsoft.VisualStudio.Setup.InstallerService.UninstallProduct(InstalledProductSummary productSummary, TelemetryContext telemetryContext, CancellationToken cancellationToken)] 2016-10-05T23:21:00 : Verbose : Getting installed product summaries. [installerId: SetupEngine] 2016-10-05T23:21:00 : Verbose : Getting product summaries. [installerId: SetupEngine] 

Can someone help me?

Answer 1

You must uninstall all previous versions of Visual Studio '15 before trying preview 5, and you can uninstall previous versions using the Visual Studio installer or use "Uninstall a program from the control panel." When the Visual Studio installer cannot work, we can manually remove Visual Studio, as shown below:

• Close Visual Studio Installer

• Delete the folder% ProgramData% \ Microsoft \ VisualStudio \ Packages \

• Delete the installation folder of the Visual Studio folder (usually in% ProgramFiles (x86)% \ Microsoft Visual Studio \ VS15Preview)

• After that, the previous installation will be deleted. Launch Visual Studio Installer Visual Studio Preview '15 again to install. For more information on installing VS preview '15, you can see it here .