DotNet Core Installation Error

Question

When installing DotNet Core on my Windows 10 laptop (DotNetCore.1.0.0.RC2-VS2015Tools.Preview1), the installation of the runtime package failed.

I found some error data in the setup log file:

web developer info:

[037C:1EC0][2016-06-19T11:07:26]e000: Error 0x80070643: Failed to install MSI package. [037C:1EC0][2016-06-19T11:07:26]e000: Error 0x80070643: Failed to execute MSI package. [2E70:3228][2016-06-19T11:07:26]e000: Error 0x80070643: Failed to configure per-machine MSI package. [2E70:3228][2016-06-19T11:07:26]i319: Applied execute package: WebToolsExtensionsVS14, result: 0x80070643, restart: None [2E70:3228][2016-06-19T11:07:26]e000: Error 0x80070643: Failed to execute MSI package. [037C:1EC0][2016-06-19T11:07:26]i318: Skipped rollback of package: WebToolsExtensionsVS14, action: Uninstall, already: Absent [2E70:3228][2016-06-19T11:07:26]i319: Applied rollback package: WebToolsExtensionsVS14, result: 0x0, restart: None [037C:1EC0][2016-06-19T11:07:26]i351: Removing cached package: WebToolsExtensionsVS14, from path: C:\ProgramData\Package Cache\{1F275091-F18D-37F3-8A70-8E6CE66BB1A8}v14.1.20512.0\ [037C:1EC0][2016-06-19T11:07:26]i372: Session end, registration key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{22041006-8484-4b8d-a13c-40189695de2f}, resume: ARP, restart: None, disable resume: No [037C:1EC0][2016-06-19T11:07:26]i371: Updating session, registration key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{22041006-8484-4b8d-a13c-40189695de2f}, resume: ARP, restart initiated: No, disable resume: No [2E70:3228][2016-06-19T11:07:26]i399: Apply complete, result: 0x80070643, restart: None, ba requested restart: No 

Answer 1

Another solution:

• go to the folder where you downloaded the installer
• open the command line Shift + right click -> Open command window here
• Type dotnetcore.1.0.0-vs2015tools.preview2 SKIP_VSU_CHECK=1 and press enter

This should skip the VS update check and start the installation as usual.

Answer 2

I was able to fix this problem with

• Disabling Antivirus
• cleaning the %temp% folder
• restart DotNet Core (DotNetCore.1.0.0.RC2-VS2015Tools.Preview1) in recovery mode

Answer 3

After applying the other answers here, the installation still fails for me. Periodically during installation, a pop-up dialog box appears with the message "Account already exists." I looked through the list of "Programs and Features" and saw 3 different entries to preview VS2015Tools. I right-clicked Uninstall'ed each of them (which deleted each one almost immediately) and tried to install again. This time it ended without errors.