Hey all, Occasionally when I start up my HP ProBook 4520s I get an error saying "Failed to connect to a windows service. Windows could not connect to the System Event Notification Service service. This problem prevents standard users from logging on to the system. As an administrative user, you can review the System Event Log for details about why the service didn't respond.". When this happens all task bars go grey and there is no longer a Windows theme. Basically looks like a really old version of windows. Also when I try restart it takes about 15 minutes to reboot. Most of the time a reboot fixes the problem temporarily. I tried looking in the system log, but there are so many items from the last 15minutes and I cannot figure out which one corresponds to the error. Has anyone experienced anything like this before? Thanks in advance.