JH, known also as Error, was found to be in the wild in Finland at the end of August 1994. The virus might have been written in Finland.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
JH stays resident in memory and infects EXE files. The files get infection almost every time they are accessed. Copying or renaming is will do the job. Virus avoids infecting some anti-virus programs.
The virus activates any time at September. It shows the following text in the middle of the screen written in red colour:
-=> ERROR Virus Version 0.1B (C) 1994 JH <=-
Description Created: Mikko Hypponen, F-Secure