"Not enough memory available to perform function."
This message will appear if system resources are low. Close other programs and try again. If this does not work, try restarting your computer.
"No apps are installed to open this type of link (file). Look for an app in the Store."
This message will appear if the file association for HTML (the Help file format) has become disassociated. Reset your file association for HTML files to your preferred browser.
Open the Control Panel in Windows, select Programs, then Default Programs, and then select "Associate a file type or protocol with a program" (Set Associations). Browse down to .html, and ensure that your chosen browser is selected as the default program.