I am having a similar problem on Win7 x32 with my Canonscan d1230U. I downloaded the recommended program (S1a7), then ran it to extract the files. There was no setup program to allow me to set up compatibility mode so I went into device manager and said I had a disk, then pointed it at the inf file, but it would not let me proceed. Have I missed something?
Would much appreciate any help anyone can give.