Windows 7: Installation Issue with IE9, Etc.

I'm having two issues which may or may not be related.

A day or two ago I noticed that my IE9 was no longer working. When I go to click the IE9, nothing happens. I decided to just uninstall it, but IE9 isn't even listed anywhere on the uninstall list. I try to download it off Windows Update, but it gives me the Error Code 9C48 message. I try installing IE9 directly, it tells me "Setup can't continue because a more recent version of Internet Explorer is installed on your computer."

And now I'm also getting the Error Code 643 when I try to install Security Update for Microsoft Visual C++ 2008 Service Pack 1 Retribution Package (KB2467174).



I don't know if this issue is related or not, but another program I've having trouble with is Logitech. When I go to uninstall it, the setup screen is blank. When I try to just install it, the same issues occurs (the setup is blank with no click-able buttons).

I'm more concern with my IE9 issue. I feel like this is leading to something else.

See this You receive error code 0x80070643 or error code 0x643 when you use the Windows Update or Microsoft Update Web sites to install updates