need assistance - possible problems with a windows 7 pc, using firefox [View all]

family member having problems with computer, can't stay connected to wifi and other issues.

today's event: tried to get him to load malwarebytes (notice my previous link since he also can't get into his email)

however when he went to the link his cursor would not let him click the windows free download! WTF??? the little arrow wouldn't turn into a finger and clicking did nothing.

he was able to go from the link at the top right of the page but it wouldn't run after apparently downloading.

he also apparently does not have ms security essentials and it is no longer available for download, though they are updating and supporting through 2023. at least is isn't in "all programs" from the start menu and searching for it by name doesn't turn up anything either.

he is reporting that edge somehow showed up on his tool tray recently??? I'm trying to do taxes but if I need to I can go out there and post from my phone while trying to follow any simple, child friendly, step by step instructions.

any ideas for next steps? (besides updating to 10, and even if he wants to, shouldn't he get rid of whatever the problem is first?)