Whilst dealing with the conflicker virus I noticed that it leaves behind a number of scheduled tasks that are named in the following fashion: AT1**.

I wrote a small script that removes them at start up.

TITLE CONFLICKER AT TASK REMOVAL
@ECHO off
SET COUNT=1
:LOOP
ECHO Scanning for Jobs Begining with AT%COUNT%
IF %COUNT% == 500 GOTO EOF
SCHTASKS /Delete /TN At%COUNT% /F >> \\server-name\conflog\%computername%-Conflog.txt
CLS
SET /A COUNT=COUNT+1
GOTO LOOP
:EOF

Every machine that runs the script will write to a log file on the server detailing the AT* tasks that it has found and removed.

The following link was useful: http://www.robvanderwoude.com/schtasks.php