Yes. All files that have been quarantined, and for which you have no use, should be deleted.
For more information on this topic, visit these other searchSecurity resources:
Virus Prevention Tip: Cleaning out a virus infection
Scheier's Security Product Round Up: Antivirus tools unify and conquer
Ask the Expert: Restoring files and pushing antivirus updates
Dig Deeper on Malware, virus, Trojan and spyware protection and removal
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.