Name: U.52 Category: Viruses Description: Details U.524 It's a dangerous memory resident parasitic virus. It hooks INT 1Ch, 21h and writes itself to the end of .COM-files that are executed. The infected files contain the character 'U' at the fourth byte from the beginning. This byte is the identification byte of this virus. This virus checks the current date and time by using CMOS memory and from May, 7th on 1:57pm it reboots computer.