unknown errror 42000

ok so i just downloaded avast! 4.6 on my windows millenium edition and every time i try to start a scan it says there was an error and the error was: “unknown error 42000”… any ideas?

I don’t know where you got avast 4.6, unless you made a typo it would be avast 4.8 for winME ?

Have (or did) you another Anti-Virus installed in this system, if so what was it and how did you get rid of it ?