This article explains what to do if you are trying to update to a new version of VideoScribe on your PC and see the message 'A DLL is required for this installation to complete'.
Symptoms
Whilst trying to install the VideoScribe software, an error message is displayed advising the user that a DLL is required to complete the installation.
Cause
During the installation, the installer will make checks to ensure that all the relevant files are available to use on the Operating System for the software to run. A DLL is a component in the registry which may be missing if you receive this message.
Resolution
First of all you need to make sure your Windows operating system meets the minimum system requirements for VideoScribe - you need Windows 7 or higher. We recommend that you upgrade to at least Windows 8, as Microsoft ended support for Windows 7 on January 14th 2020.
Next, make sure your Windows Operating System is fully up to date if you are having trouble installing software.
If you are having an issue installing VideoScribe due to a missing DLL, use Windows Troubleshooter, which is a Microsoft application that runs a check for errors on your computer and will try to fix them.
Disclaimer: We like the software recommended on this page, and it has performed well during ordinary use, but we have not undertaken any in-depth testing and we have not checked it for the presence of malware or any potentially harmful behaviour, so you download and use it at your own risk and we do not accept any liability for any loss or damage it may cause.
First check the article Use the System File Checker tool to repair missing or corrupted system files on the Microsoft support site.
If this does not resolve the issue, please try the following steps.
Stop and restart the Windows Installer Service
Step 1. Click the Windows menu button 
(formerly the Start button).
Step 2. In the Start search box (A) type 'Services' and select it when it appears
For Windows 8 computers you may have to search for 'Services' in the settings menu then select 'View local services' (B).
Step 3. Expand the 'Services' window and scroll down to 'Windows Installer'
Step 4. Right-click the Windows Installer list item, select 'Stop' (C), then Right-click again and select 'Start' (D)
Add the 'Everyone' group with full control
Step 1. Click the Windows menu button (formerly the Start button)
Step 2. In the Start search box (E) type ‘%localappdata%’ and then click the AppData/Local folder item (F) that appears at the top.
Step 3. In the folder list, right-click the Temp folder (G), select 'Properties’ (H).
Step 4. On the 'Security' tab (I), click the 'Edit' button (J)
Step 5. On the next screen select 'Add' (K)
Step 6. In the text window on the next screen, type 'Everyone' and then click 'Check Names' – 'Everyone' should now be underlined and click 'OK' (L).
Step 8. Check the box for full control (M) under the 'Allow' column, then click ‘Apply’ (N), and then ‘OK’ (O).
Step 9. Full control will be now be granted allowing
If you need any assistance with any of the above or have further questions please raise a support ticket and provide as much information as you can about the steps you have taken.