Showing results for 
Search instead for 
Do you mean 

Error: -1603 Fatal Error during installation.

Copper Contributor
Posts: 7
Country: USA

Error: -1603 Fatal Error during installation.



I'm trying to uninstall Act 8 from my computer so I can install another version of Act. My computer is running Windows XP. When I go to add or remove programs and remove Act Premium 2006 it starts to uninstall then gets to a certain point and pops up the "error 1603 fatal error during installation" error.


Any help would be greatly appreciated.



Platinum Super Contributor
Posts: 5,275
Country: USA

Re: Error: -1603 Fatal Error during installation.

Hello Jmhollid,

Welcome to the ACT! Online Community!


To help uninstall the Act! 2006 program, here is an article with instructions for using our Act!Uninstaller utility: KB Article 19338

Within this article it also has a link to instructions for manually removing the Act! program components.

Greg Martin