When the virus activates on a computer with an EGA or VGA display adapter, it will "flip" the screen horizontally and switch to a special character set, which reverses each character. This effect only happens on the second day of each month, between 16:00 and 16:59. The Tequila virus is clearly derived from Flip, and is probably from the same author.
Flip contains this encrypted text: "OMICRON by PsychoBlast".
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.