The file was downloaded using Download Accelerator, which recorded a successful download.
I know windows uses disk space for its operations, but I had 8 gig free before installation started. I can't believe the AH2 installation requires that level of system resources.
I'll try to clear up more disk space tomorrow and try again. I'll let you know how it goes. Last resort I'll download version 3.
Thanks for your help XtrmeJ, Skuzzy.