Similar but not the same problem installing Payroll 2014 ("failed to load vsprinter from vsprint8.ocx - your version of vsprint8.ocx may be outdated - make sure you are using the version of vsprint8.ocx provided with your application" which is typically unhelpful).
Afrer reading the MS knowledgebase article referenced above though, the part about running as different users gave me pause for thought. The problem was occurring on only one of the three computers we had installed it on - the one with Windows 7 (the other two are running XP and Server 2008 respectively).
So I uninstalled from the Control Panel and then re-ran the installation, but right-click and "Run as Administrator" and everything appears to be working fine. Still doesn't explain why the server doesn't have the problem (AFAIK 2008 and Vista have the same security model, which is pretty much the same as the one Win7 is based on) but anyway - you do what works, and no more, innit, otherwise you run the risk of breaking something else.
Incidentally, "taking the problem up with program support" is easier said than done here is South Africa, you can be on hold to support for easily an hour listening to their appalling music and even worse PR schpiel. Eugh.
Edited by ChrisBedford, 19 March 2013 - 05:44 AM.