But think back to when these problems began. Was it after you installed multiple security programs or after these updated?
Think about a simpler system.
Bob
Unable to use rename. Command is normal for less than 1 second then reverts back to prior state. I have to use "properties" to rename files. Cannot use Favorites or Bookmarks. They drop down normally but disappear before you select anything. Cannot type addresses in Firefox or IE. I type 1 or 2 letters and they become high lighted in blue, as in rename, and are deleted for the next letter. Now I type the site I want in a search engines and enter the site that way. My system is built around a P5q3 Azus motherboard and runs 7 Ultimate, Norton360, Advanced System Care, and A-Squared free.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic