eEye Digital Security

 Attempted to install on fresh Windows 7 Home Premium install
 
Error 1904  Module C:\Program Files (x86)\eEye Digital Security\Blink\EEYENTHST.dll failed to register.  HRESULT -21470 10895

 That error code translates to: The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log or use the command-line sxstrace.exe tool for more detail.

You may need to reinstall the VC Runtimes from here:

http://www.microsoft.com/downloads/details.aspx?familyid=9B2DA534-3E03-4391-8A4D-074B9F2BC1BF&displaylang=en

AND

http://www.microsoft.com/downloads/details.aspx?familyid=BD2A6171-E2D6-4230-B809-9A8D7548C1B6&displaylang=en

lnicula:

use the command-line sxstrace.exe tool for more detail.

Are there any instructions on how to use this properly for the user?

lnicula:

You may need to reinstall the VC Runtimes from here

The two links Nicula provided you are for the 32bit and 64bit versions of the VC Runtimes.  You need to pick what applies to your system only.