harkrishnat :
Hello,
I am using assembled windows-7 PC and used to do small projects in my system. I am facing lots of problems with virus. can you please let me know the best anti-virus?
It all depends on what you mean by "best" If you mean which one has the highest detection rate, you should keep in mind that there are other issues to consider besides detection rate. For example, the program "G-Data from Germany currently has the highest detection rate of the major AV programs. Does that mean it's the best? Let's compare it with another popular program mentioned here, ESET's NOD32. When it comes to detection rates NOD32 is 9th on the list. Does that mean G-Data would be preferred over NOD32? First of all, though NOD32 ranks lower on the detection scale than G-Data, there is actually only one tenth of one percent difference between the two. This is hardly enough to cause concern when there are other factors to consider.
Another important factor is the issue of false positives. G-Data has six times the number of false positives that NOD32 has and also has some stability issues not present NOD32. Others factors also come in to play like scanning speed, ease of use and the availability of extra features that the user may find important to them.
The best thing to do, is download the PDF files from the AV Comparatives website as recommended by Area51reopened and make your own choice using their data.