A family of Microsoft relational database management systems designed for ease of use.
Sorry to dig out this old thread, but this year our company switched to Office 2013 and also Visio 2013 and thus I also got this problem with the blurry images.
Unfortunately, I got a click-to-run installation (version 15.0.4711.1003) for which the KB patches do not apply. My update setting is "Automatically", so I should suppose I already have this patch.
However, looking in the installed updates log window, there are no update for Office listed at all. Thus I don't know whether I have this patch or not. So I started "Update now" and it downloaded and installed some updates, but no change. Version is now 15.0.4763.1002.
OK, let's check the registry. Path HKLM\Software\Microsoft\Office\15.0\Visio\Application does not exist. There is no key Visio in 15.0. But I found it in HKCU\Software\Microsoft\Office\15.0. Unfortunately, no value SupportHighResImage. OK, I just created it and restarted Visio - still no change. What to do now?