Adobe Acrobat 4.0. Reinstalling on new hard drive, but now receives incompatibility error

My hard drive crashed and I have to reload my programs. I have dell optiplex. They sent me an imaged hard drive because I am under warranty. It is running win 7, sp1. Prior to hard drive crash, I was using my Adobe Acrobat 4.0. I receive my new hard drive, and am reloading the same programs that I had. Except, I am now receiving an incompatibility error. This does not make sense to me, as I had win 7 sp1 before, I installed Adobe Acrobat 4.0 before, but now it will not appear to work because upon installation I am getting an incompatibility errior. Are there any work arounds.