When installing Datalink, you may encounter a number of different errors that will prevent the installation from completing. This article will guide you through how to solve the most common issues:
Visual Studio Tools Error

1. Visit the following link and install: Visual Studio Tools for Office
2. After that is complete, try installing Datalink once again.
Datalink Setup Error
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1. Open Internet Explorer and open Internet Settings from the Gear drop down.
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2. Navigate to the Advanced tab.
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3. Scroll down to the Security section and select Do not save encrypted pages to disk. Click Apply and then OK.
 
Office Customization Error
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1. Click Start, open the Run app.
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2. In the open box, type regedit and then click OK.
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3. Find the following registry key:
\HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\.NETFRAMEWORK\Security\TrustManager\PromptingLevel
If the key does not exist, create it.
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3. Add the following subkeys as String Value, if they do not already exist, with the associated values shown as follows...
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Another Version Currently Installed Error
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1. Click Start, open the Run app.
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2. In the open box, type regedit and then click OK.
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3. Find the following registry key:
\HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\VSTA\SOLUTIONS
There should be a folder under 'Solutions' that is linked to Valcre. If there is more than one folder, click into them until you find one which relates to Valcre/Datalink.
You will then need to delete the entire folder and then attempt to install Datalink again.