Just googled it and it may be a virus

“Internet Security Essentials is a fake antivirus program from the Virus Doctor rogues family as Internet Antivirus 2011, My Security Shield, Security Master AV, My Security Engine, etc. The program displays a lot of fake errors messages, prevents softwares execution, hijacks internet browsers in order to trick you into purchasing a license. Remember, the fake antivirus is unable to detect and remove any infections, so do not pay for the bogus software! “

More details here http://www.myantispyware.com/2011/02/21/how-to-remove-internet-security-essentials-virus/

microsoft security essentials is okay – not sure about ‘internet’ security essentials though

Just had some malware on my PC – the system tools virus which was a right pain in the backside. Managed to get rid with Malwarebytes, microsoft security essentials and Auslogics registry cleaner