Hi, good day! I'm John Dev a Windows user like you and I'll be happy to assist you today. I know this has been difficult for you, Rest assured, I'm going to do my best to help you.
Press Start then search Installed apps
Find Logitech Download Assistant in the list
Select it then click Uninstall
Kindly let me know if this helps or if you have any further concerns.
Kind regards,
John DeV
Independent Advisor