I have a computer here (Win 7 64-bit) that wouldn’t accept the latest service pack. It kept looking for the original install location for sr3, but even when I pointed to it, the installation failed. I ended up uninstalling Rhino and starting fresh. Unfortunately only the 32 bit version will install. I’m getting error 1603. The 64-bit icon appears for a minute or so, then disappears and the installation fails. I’m using the 5.5.30717.16015 install file. Rhino 5(64-bit) was installed here previously.
Any advice? I am logged in as administrator.
edit: Found the wiki page covering this error. I will see how that goes.