ATI External Event Utility EXE Module. This task can consume lots of CPU resources on some computers, but it can help with graphics card problems. Leave enabled unless it consumes too many CPU resources
Have you recently upgraded your graphic drivers? If not, then try looking for a newer driver otherwise if you have then roll back to your previous one
Also, try disabling it
Start>Run>type in MSCONFIG
Look in the startup up tab for that and uncheck it..Reboot and see if the problem persists