It could just be a false positive. All AV vendors suffer from them, try rescanning your system again with Panda and see what it finds.
Find the suspect file and then scan it at
jotti and
Virus Total which use multiple AV scan engines, to confirm if its infected or clean.
You may also want to scan using the one of the following in safe mode
(Getting to safe-mode) Sysclean you'll also need the virus template file from
here lpt***.zip remember to extract the contents of the zip file into the same folder as Sysclean.com
or
DrWeb CureITor
KASFX which is powered by the Kaspersky AV engine, you will need internet access to update it. If you haven't got net access in safe mode, update it before you use it.
If your good with the command line also try
Sophos Command Line scanner this command will scan all of your hdd's SAV32CLI.EXE -F -di -remove -dn -mbr -all -zip -p=avscanlog.txt and give you a log file to review afterwards.
If you think you are infected submit a
hijackthis log to the HJT Forum.How to submit a hijackthis logDownload Hijackthis