Nope, I dont install and updates whatsoever, I just run them how they are installed straight from the CD. Saves a lot of hassle and I never have problems with security but it might well be suseptable to a hack, behind NAT and SPI firewall it shouldn't have any issues
IMHO.
I would install patches in a corporate enviroment but as this is for only home use, I dont tend to bother as I've never had a single issue regarding not patching.