The MSSQL installer does not go through - it's missing .NET 3.5 framework to complete.

Unfortunately I've been unable to solve this, what I've tried:

Manually download and transfer the /sxs folder(which should contain the driver) to the C: drive, hereafter running this command in powershell(with admin rights): install-windowsfeature -name NET-Framework-Core -source c:\sxs - It does indeed move on to install it, but gets stuck at 68%.

I've also tried downloading and transferring the .NET 3.5 installer itself from Microsoft, and going through the official way of installing it (Server Manager). Same thing applies - it gets stuck roughly 68% into the process, and hereafter just informs that the service-feature could not be installed.

Quite out of options. Help appreciated.

  • There should be a much more descriptive error message than "it gets stuck". What does it say in powershell once the installation has failed? – Reaces Dec 14 '15 at 13:59
  • Possible duplicate of Unable to install .net 3.5 on Windows server 2012 – Reaces Dec 14 '15 at 13:59
  • @Reaches indeed I get the same trying to update from server manager. – cbll Dec 14 '15 at 14:00
  • @reaches you're right. Now that I look at it, it appears that the powershell output is due to lack of internet connection.. But I still have the same problem as the duplicate, the path is provided but it still fails(exactly same) – cbll Dec 14 '15 at 14:03
  • Perhaps this link can help you out then. – Reaces Dec 14 '15 at 14:29

I solved this by copying the .\sxs folder off the installation media for windows 8. Hereafter, I ran the command dism /online /enable-feature /featurename:NetFX3 /all /source:C:\sxs /LimitAccess and it installed fine.

| improve this answer | |

Use this batch file:

@echo off
Title .NET Framework 3.5 Offline Installer
Dism /online /enable-feature /featurename:NetFX3 /All /Source:.\sources\sxs /LimitAccess
echo .NET Framework 3.5 should be installed
| improve this answer | |

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