I always face virus problem and network block with other antivirus. I decided to buy zone alarm for it included firewall, virus scan and removal, spyware scan and removal.
Zone alarm is very easy to install. First you must have the serial number obtained on the box when you buy the software. Remove any other antivirus and spyware software. Disable your windows firewall.
You open zone alarm, and insert your email address and if you want review from zone alarm.
You must choose the auto learn option, , this allows zone alarm to study your behaviour with programs and then will protect your pc after having learnt which software will be allowed or not. Dont worry if you open a software which zone alarm did not take into consideration during the auto learn process a pop up window will open and you just have to click accept.]
Zone alarm comes with the up to date list of viruses and spyware. Upon detection of virus and spyware you just have to click delete *(quarantine if you want) and its done quikly unlike other antivirus which are not able to remove virus from the root.
It get updates automatically or click on update on virus and spyware section (be sure that your pc clock is up to date or else it will not update)
You can put allowed IP address in zone alarm and it will allow connection from those IP address only and will remember it until you change unlike other firewall software.
Now i can allow any one to surf the internet from my PC and even if they go to site that has many spyware or virus, my zonealarm suite will remove it.
I have even put microsoft outlook to be monitored by zone alarm making me rest peacefully knowing that i will not get virus via my mails...