Hi,
The +3.3V power supply for cypress microcontroller (U3) is taken from USB, so when USB is plugged in (D4 ON), there should be a detection happening.
There are 2 software revisions: revB and rev1.4 (found in AD5933 Software and Tools )
I tried installing each rev in 64-bit system and 32-bit system, both worked well.
EVAL-AD5933EBZ has been detected and appeared in the device manager as expected.
Can you try uninstalling the software you installed and use the latest software -- rev1.4 that is found in the link above.
You may also try to check the following:
- check if your USB cable is good or not. Sometimes, we neglect it but It's worth checking.
- try to use other USB port as well
Let us know if there are still problems.
Thanks.