Test and Measurement Technical Data

Fixing Installation registry problems

When the dScope software is installed, Windows keeps a note of details of the installation so that the un-install process can work successfully. When a new software version is installed, this information is used to neatly un-install the previous version and install the new one.

If the software is simply deleted rather than correctly un-installed, Windows will think that the software is still installed because it will still have details of the installation in the registry. When attempting to install a new version the installer will try to un-install the previous version based on the details it has. Since it doesn't exist, the installation fails.

Also, if the installation is interrupted before it has completed correctly, Windows may think that the installation process is incomplete and attempt to resume installation, or it may have partial incorrect references to the software.

To rectify these problems, you need to clean out the registry entries that make Windows think the old software is still installed.

• Firstly, back up your system registry.

• Link to the following web page for details of the Windows Installer Registry Cleanup Utility from Microsoft - be sure to read the information and warnings carefully:

Click here to download the file msicuu2.exe from the Microsoft website

• Run the downloaded file to install the Cleanup utility.

• Run the Windows Installer Cleanup program from the Program Files menu, and select “dScope” from the list of products that it thinks are installed. Select “Remove” to remove its installation details from the registry.

• You should now be able to successfully install the dScope software.

Note that this process will not remove any dScope files or other registry settings; only details of the dScope installation.