What has happened is that your antivirus or antimalware software has properly identified client.exe as an unwanted program and removed it. When this happens, however, there are often remnants of the malware left behind that attempt to start the now-missing malware executable.
In your case, it seems that there is a scheduled task that is attempting to start client.exe.
Click the Start Orb, type the following into the Search box and press Enter
Task Scheduler
When the Task Scheduler window opens, click on "Task Scheduler (local)" in the left pane
Use the scroll bar at the right to scroll down to "Active Tasks"
Use the inner scroll bar to scroll through the list of Active Tasks to find the one that is attempting to start Client.exe. Look for "C:Program Files (x86)Search Extensions in the "Location" field