Warning: Use of undefined constant user_level - assumed 'user_level' (this will throw an Error in a future version of PHP) in /homepages/3/d98111892/htdocs/insanelabs/htdocs/wp-content/plugins/ultimate-google-analytics/ultimate_ga.php on line 524

Start – Run – paste the following line there and hit OK:

%systemroot%\$NtUninstallKB917013$\spuninst\spuninst.exe

This should bring up the hidden uninstaller.