Having problem uninstalling 16.3 and reinstalling 16.3

Hi there,

I was using cadence 14.2. I have also installed 15.1. Both versions worked properly in 1 XP machine.

I upgraded from 15.1 to 15.5, from 15.5 to 16.2, and finally from 16.2 to 16.3.

However, my 16.3 didn't work properly. After I uninstalled 14.2, my 16.3 was completely shot. I couldn't uninstalled it or reinstalled it.

Could someone help? Thanks!

Regards,

Andrew