Many users of the computers wonder why OS makers do not own the responsibility of securing it. However, none of those OS developing companies guarantee you that its software is free of bugs and errors. Software is supposed to be with certain bugs, problems and other issues which can be fixed in future. Also, most of those OS based machines are connected to the web and larger networks. It exposes them to certain kind of activities which are not desirable but happen. For example, if you leave a Window OS based machine exposed to the web without any protection, it would be compromised with in next 10 minutes. An antivirus is an essential piece which must be loaded in your PC on the top of its operating system. No antivirus can be so much efficient that it would stop the attack fully. There are and there will be grey areas which would be used for exploitation. An antivirus and anti-malwares tool is the key to solving these problems to some levels where you begin to feel that now business can be conducted without worries. The great news is that some of the vendors have begin to offer the free antivirus downloads which can include the software and virus definitions that must be loaded as soon as you have installed the solution.
It is great initiative on the part of the anti-virus vendors that most of them have begun to offer the free online antivirus tools which can be used for scanning and fixing the problems in your PC. The services such as free.antivirus.com and others have helped the users to remove the malicious codes and binaries from their PCs and put them back on the web again. It works better for most of the people that you always get the one or another antivirus solution. Though, these solutions are not perfect but certainly are better than not protecting your PC at all.