Issue when uninstall ASP from windows

Usually you get very far using the Installation media, and select remove from the setup.

But since you mention that you have issue uninstalling i guess this is not an valid option.

ASP is so many various components and software that can be individually uninstalled through add/remove programs.

But there is a technote available for version 2020, it might give you some guidance

Uninstalling AVEVA System Platform 2020 versions

softwaresupportsp.aveva.com/

Forum seems to remove links behind login. I added a space in the link in hopes that it is posted

https:// softwaresupportsp.aveva.com/#/knowledgebase/details/000032573?lang=en_us