unable to uninstall aspen hysys

[aeonstorm]

Hi, i've tried to install aspen hysys 7.3 recently but i think i didn do it properly and it failed to run. after that i tried to uninstall it to do a fresh installation but an error 1722 pops up instead during uninstallation and now im stuck. any help on this?

[mubarikall]

You have to remove all entries from windows registry for Aspen and Hysis application. this can be done through regedit and find/search process. Otherwise you have to re-install windows after formating the C drive.