I get this error when uninstalling the app from the Windows 10 system level add/remove programs page:

I installed it for a survey on Prolific and don't want it anymore.
I don't understand how I would open the add/remove page in admin mode. The specified file is either hidden or does not exist in the specified directory when I navigate there in windows explorer.
I cannot trust this app given this experience and will not use surveys that use it anymore. I also cannot recommend that researchers or survey participants use it.

I have already restarted and tried the msiexec /unregister/regserver method suggested 3 years ago.

I'm making new posts because I can't find the edit button again.
The file it's specifying is not hidden, as I have show hidden items checked in widows explorer.

For anyone else experiencing this difficulty, go to this link
https://support.microsoft.com/en-us/help/17588/windows-fix-problems-that-block-programs-being-installed-or-removed
It appears to have worked for me. I would appreciate it if the devs would point out where any lingering files might be hiding.

The web player is a single executable, which is placed under

C:\Users\YourUserName\AppData\Roaming\Millisecond Software\Inquisit 4 Web Player\

under normal circumstances. There are no other lingering files.

I tried to install Inquisit on my system having windows 10 OS but every time I am getting windows update error 80070103 whenever I open it. Can anyone tell me what is the reason behind this issue?