Portable error scanner is a standalone version of the antivirus program, security and information technology is a more convenient option, mainly because you do not need an Internet connection, hence the use of the program. Viruses or malware pose the biggest threat to business and home users today. Once your system is infected, it is very difficult to install or run anything on the system. Therefore, in this situation, we need a portable antivirus. A small anti-virus utility can be run without installation, although it can be run from a USB stick. A heavily infected computer may not be able to access the Internet, so a standalone portable strain scanner may come into play in this situation.