Bob
1) Unfortunately that is a WinXP error message, not much help. Alan suggested, “You may want to install a tool like “codec sniper” — something that will list all of your codecs, tell you if they are “ok” or “broken”, and let you remove bad codecs.”
2) I use the classic start menu but there are options for how many programs to list in the recent programs list as well as a clear button in the start menu you use.