Windows 7 Home Premium SP1
I had a Windows Update occur last night, which was just a normal thing. Right after the update, MSE started getting the error code 0x80070002 whenever I tried to start the program, or when I would boot up the machine. I Googled answers for this and the best thing I could do was uninstall MSE.
I'm trying to reinstall MSE because I like how lightweight it is and because Windows keeps bugging me about it. I am aware that I can disable the notifications, but knowing that I don't have any protection is just something I don't want to be aware of.
Anyway, when I tried reinstalling it, I ran into the error code 0x80070643. Googling again led me to see that this is just some sort of installation error.
I don't have any other antivirus programs installed aside from Windows Defender. I've tried running several Microsoft Fix Its, and a bunch of command prompt steps, but it's still to no avail.