I kept getting an error today when trying to install software for a DYMO label maker.
I tried a Microsoft Fix it, that failed. Then I tried a few things I read on forums, like re-installing .net framework, that did not work either. I was logged in as administrator but the installed still failed. What worked for me was to right click command prompt and "run as" administrator. I then switched to the cd drive which in my case was E: . Once the command prompt at E:\ I typed in "setup.exe". Everything went off with a hitch, I plugged in the DYMO, ran the software everything worked as expected.