ContributionsMost RecentMost LikesSolutionsRe: Error while installing trail version - TestComplete.exe is running Hi, I had the same problem when trying to install the first time. Since I never had an installation of TestComplete on this machine the information above about uninstall is not helpful. Uninstall something that is not installed simply is not possible. I resolved the problem by downloading the same setup a second time but this time from a different page: Your Trial of TestComplete | SmartBear Software using the 'Try Any Tool for Free' - button. The installation of this download worked, but now I had to register once again for the trial license. A pop-up was asking me how to continue and I needed to register once more. The trial license then worked fine and the tool can be used as expected. Hope it might help someone who faces the same problem.