I am having the same problem (stuck in "Verifying the device")
Using file IBXW_INST_1_4_0_5_U01_9L.zip of 2014-11-25 downloaded on 2015-01-10.
Windows 7 Pro x64 SP1
Rebuilding clean install on a new disk (minimal cruft)
No USB devices connected except camera (PowerShot S100), keyboard and mouse (suggestion made in previous comment).
No related error messages in the Event Log (looked in Windows > Applications as suggested in another thread on this problem).
When camera was connected, it was detected and drivers loaded. Can see the camera with other apps (that is, evidence that the USB ports and the cable are working). Have tried on different USB ports on the computer and with a different cable. Have rebooted multiple times and retried installation.
