While trying to diagnose a time-zone issue in an Azure application, I lazily changed my system clock to be an hour earlier instead of actually changing my system timezone. I then found I couldn’t start my app in the emulator:

CacheInstaller.exe has stopped working? Check your system time

If your system clock is out by more than about 10 minutes and you’re trying to use the Azure cache for development purposes then you’re going to have some trouble.

Remember – having your system time right doesn’t just mean setting it up to look right on the clock in the taskbar, you also need to be in the right timezone so that calculations to and from UTC are performed correctly.