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Unable to Open Main Window of ESET Smart Security or install a new version of the program in my computer

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I tried to file an issue through customer service, but I never received a notification email for my service request, which is why I'm posting this issue here.

I used your free trial without problems in my device. At some time, close to its expiration date, the program started to have problems because I couldn't open the program's main window. It says: 

" The app can't run because it causes security or performance issues on windows. A new version may be available. Check with your software provider for an updated version that runs on this version of Windows." 

I downloaded an installer, but it failed to work. It never finished installing. The troubleshooter suggested that I should restart the computer and try using the installer again. However, I tried doing this three time, but failed. I also tried uninstalling the ESET program that I already have myself, but I couldn't uninstall it nor repair it for some reason. I believe the installed version is, but I am not sure because I can't open the program. My computer has Windows 11 installed.

I would gladly appreciate any help. 

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You've mentioned version 10.1.245, perhaps you meant ESET Endpoint 10.1.2045?  Anyways, it appears that you have an ESET Internet Security license so please uninstall ESET, run the ESET Uninstall tool in safe mode to remove possible leftovers and then install ESET Internet Security 17.1.9 from scratch.

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