Will having a firewall prevent the blaster worm from infecting my PC?

From: Jim (jimbo_presto_at_yahoo.com)
Date: 08/12/03 

Date: Tue, 12 Aug 2003 11:32:23 -0700

I'm currently out of town and have no way of knowing if my
roommate used my computer this morning. I have Sygate
Personal Firewall and Norton AntiVirus installed on my
computer. Will any of these block the blaster worm from
infecting my computer until I'm able to install the
patch???

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