Today I had several issues when I tried to do an update to my phone's firmware. When I run the NSU application, it just get stucked in the initial startup screen and freezed for about 60 seconds, showing then an error message saying: "Missing Software Components - Some critical components were missing, please reinstall", or something like that.
Let me just say that I'm running on Windows Vista, with the latest version of both Nokia PC Suite and Nokia Software Updater, and with a non-administrative account.
After some trial-and-error with no results, I've unninstalled both apps, reboot, log-in as THE Administrator (not a regular administrative account) and installed first Nokia PC Suite and than Nokia Software Updater. Et voilá! It's working! Now it works even in my non-administrative account! :)
Developers should get used to develop applications targeting non-administrative users. Although these apps need to install drivers, wich requires administrative privileges, installing them with a "run as" approach should be sufficient.