As thee are many advantages in link building and link building services, there are some bad aspects which has to be taken care of. Computer virus is a big headache which has the capacity of swallowing the entire records and other important particulars that have been fed in the web page. Software personnel are responsible to give a virus free website to the customers and it is the main duty also for a search engine optimization consultant when providing a web page or web site, Once the records are destroyed it is very hard to retrieve them. They have to seek the technical service people’s help and they have to spend long time and put tedious efforts to solve the problem .However in the modern technical world there are many anti virus software are available in the market as well as with the soft ware personnel. They could avoid and keep in control their websites from these virus problems. Finally we have to thank the great inventor Charles Babbage who invented the so called computer (it was called and named as analytical engine on those days)in which all web pages, websites and link buildings are implied. Now it is used and giving various advantages from the common man to the millionaire level business entrepreneurs.