virtualbox-dkms 4.1.12-dfsg-2ubuntu0.6: virtualbox kernel module failed to build

[Ingo Purkert]

virtual box worked fine until Systemaktualisation suggest that it would be better to install "new HardwareSupport". So i did but after that ... virtualbox never starts again. It says: No kernel drivers

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: virtualbox-dkms 4.1.12-dfsg-2ubuntu0.6
ProcVersionSignature: Ubuntu 3.13.0-30.55~precise1-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
DKMSKernelVersion: 3.13.0-30-generic
Date: Wed Jul 16 18:13:50 2014
InstallationMedia: Ubuntu 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204)
MarkForUpload: True
PackageArchitecture: all
PackageVersion: 4.1.12-dfsg-2ubuntu0.6
SourcePackage: virtualbox
Title: virtualbox-dkms 4.1.12-dfsg-2ubuntu0.6: virtualbox kernel module failed to build
UpgradeStatus: No upgrade log present (probably fresh install)
VirtualBox.ModInfo: