A PC which unsecured connected to the Internet, is the victim of an attack within a very short time. This means that on the PC any viruses or malware generally settle. That happens in part automatically, since this malicious software automatically scans the Internet for potential victims.
Security of PCs
However, if you connect a PC to a router to go on the Internet is not necessarily secure, even if he has not explicitly installed security software. So, usually has the router has a firewall and does not allow that without someone accesses the network and the PC is connected. The normal Windows PC nowadays again has a firewall that is automatically set up when installing the system. This is also sufficient. You must therefore install does not have a firewall on the PC. A complete (company) is however connected to network with the Internet special firewalls provide additional security.
Install virus scanner
There are also several free virus scanners on the network in addition to the commercial virus scanners. With Microsoft Security Essentials, Microsoft preceded as a good example. The virus scanner, which since there have a different quality. Commercial virus scanners do more often. Because it requires a great effort to keep the virus database up to date. The programming of the anti-virus software is anything but trivial. Free or ad-supported systems cannot afford that often. At the same time use but only a virus scanner and not several. This would interfere with and take also much CPU power.
Conclusion:
A PC should be protected by a firewall and a virus scanner. Ever more importantly, the data and more complex which is networked, the more security should be used. The use of multiple software firewalls on a PC is not recommended. This brings no additional security - on the contrary.
Security of PCs
However, if you connect a PC to a router to go on the Internet is not necessarily secure, even if he has not explicitly installed security software. So, usually has the router has a firewall and does not allow that without someone accesses the network and the PC is connected. The normal Windows PC nowadays again has a firewall that is automatically set up when installing the system. This is also sufficient. You must therefore install does not have a firewall on the PC. A complete (company) is however connected to network with the Internet special firewalls provide additional security.
Install virus scanner
There are also several free virus scanners on the network in addition to the commercial virus scanners. With Microsoft Security Essentials, Microsoft preceded as a good example. The virus scanner, which since there have a different quality. Commercial virus scanners do more often. Because it requires a great effort to keep the virus database up to date. The programming of the anti-virus software is anything but trivial. Free or ad-supported systems cannot afford that often. At the same time use but only a virus scanner and not several. This would interfere with and take also much CPU power.
Conclusion:
A PC should be protected by a firewall and a virus scanner. Ever more importantly, the data and more complex which is networked, the more security should be used. The use of multiple software firewalls on a PC is not recommended. This brings no additional security - on the contrary.