Photoshop :: Unable To Open Any Photos In CS4

I am running Vista 64 bit, and have downloaded my CS4 to it.  It will not let me download any updates thru the Help section- gives me "Adobe Output module 2.1 Failed to install.  Install process has encountered a problem"  but do you think it tells me what the problem is?   It also tells me the "Services update- Failed to install"  I have been at this for several days, and I am just about at my wits end!  And when I try to open photos in CS4 it tells me "The specified module could not be found.   C:Program Files (x86)CommonFilesAdobeAdobeVersionCueCS4Client4.0.1VersionCue.DLL"  I understand the RAW files from my new camera (Canon T1I) won't open because there is no plug-in for it yet, but I can't even open RAW from my previous camera (Rebel XT), nor will it open any JPEGs.  I get the same message for any attempts.  I had no problems with the CS2 opening my older RAW files or JPEGs.  When I open CS4 I get a message about the NVIDIA upgrade, which I finally was able to get that downloaded, tho I still get the message when opening CS4.  I also am having issues now, that says the computer is giving me a "Blocked Startup Programs" message when turning on the computer.  Is this affecting the CS4 somehow?  I never had this message until the last month or so.  Have no idea why it is now blocking programs.  The Adobe CS4 Service Manager is on the list of blocked programs.  Any ideas how to go about unblocking these, and reasons why they may have been blocked in the first place?  The list is about 30 programs long!  As you can tell, my computer "knowledge" leaves much to be desired!