Download Portable ClamWin
Portable ClamWin is a powerful antivirus that allows you to maintain your computer protected against viruses and threats that may be attempting to access your system and corrupt your registry. With this program you will be able to scan your hard drive in search of any dangerous application that is slowing down your computer, detect and remove the ones that are trying to infect your files and many other things. Since an installation is not required, the program can be stored in USB pen drives and executed everywhere you go. In addition to that, it automatically alerts you via email when something is trying to infect your computer.