Windows version:windows 7 64bit
It is running on an admin account.

I tried to install it for the first time today, went through the install and sign up, then when i clicked on the desktop icon it said “WhatPulse is already running.” but I can’t see any user interface. In the task manager it shows a Whatpulse Process running but no programme. I’ve reinstalled a few times but the same thing happens each time.

That seems quite odd. Are you sure that you just haven’t neglected to check your hidden tray icons?