Install free portable antivirus on a USB stick is one of the most useful applications of these devices, allowing us to have a portable security kit to repair computers infected with viruses.
To have free portable antivirus on a USB resort to one of the many existing repositories of portable applications on the Internet and install our USB antivirus and anti-spyware portable version, which run from the flash drive.
A portable application is a version of a program that can be worn on a removable device such as USB memory, CD or DVD and can be run from the portable device without previous installation on any computer with a supported operating system. Portable applications have no dependencies on external libraries or data stored on the computer you are running, both versions, plain and portable, exactly alike in appearance, use and operation. Usually this is free software, free software, open source or freeware.
The portable version of an application is usually generated by modifying the source code for the application does not store data on the host computer and compiling the application statically rather than dynamically to eliminate dependencies, so that libraries are part of the executable instead of use external libraries. When you can not modify the source code is often used virtualization runtime application.
Free portable Antivirus
The free antivirus portable antivirus allow us to keep on a USB stick and run it from the USB drive itself to analyze the host computer, which is very useful when the infected computer has no internet connection or do not have an updated antivirus.Generally we will use for analysis on demand, that is, not as resident antivirus protection in real time but for manual scans. Install on the USB antivirus and antispyware:
- Antivirus: protect, detect and eliminate all types of malware such as viruses, worms, Trojans or adware. One of the most recommended is ClamWin Portable.
- Antispyware: programs dedicated specifically to detect, block or remove spyware, a type of malware that secretly collects information about users and their activities. A good choice is Spybot Search & Destroy Portable.
As in the normal versions, portable versions of antivirus and antispyware should be kept updated to be effective, since otherwise their antivirus engines (detection technology and signature database) will be quickly outdated and detection capability will be decreased.
Repositories of free portable applications
Although there are online repositories with free portable applications for all major operating systems, we will detail only those dedicated to Windows, because viruses are a problem mainly on Windows platforms, for GNU / Linux and Mac are virtually nonexistent:
- Lupo PenSuite.
- WinInizio PenSuite.