You can try ignoring this warning and install avast anyway. There is a chance it's gonna work OK; if it doesn't let us know...
Thanks
Vlk
I solved this error, in the past, when I was making 'tests' of avast in a very old PC with Windows 95! When I installed 'Office 97' there (this is becoming the Jurassic Park!) avast! runs smoothly after, without asking for ODBC... Is that what you mean Vlk when said 'There is a chance'?