Trackswap Type Subtype Creator(s) Date Place of Origin Source Language Platform File Type Aliases Family File Size Infection Size Infection Impact Reported Costs MD5 Hash SHA1 Hash CRC32 Hash Trackswap, also known as Xboot is a Bulgarian boot sector virus on MS-DOS that originated around 1989. It is a part of the "Plovdiv" group of viruses, named for the fact that they were created by a programmer from Plovdiv, Bulgaria. This is one of the first known boot sector viruses ever discovered.