not a valid win32 application for officestd.exe

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1.C:\Document.......\OfficeSTD.exe is not a valid Win32 application

I d/l the trial version and when I double-clicked the file in "My Documents" 
to activate it I got this message C:\Documents and Settings\"my name"\My 
Documents\OfficeSTD.exe is not a valid Win32 application. I'm kinda lost 
because I thought it was supposed to be as simple as point and click. Any 
help on this matter would be greatly appreciated.
Thanks a million, 
snow...

2.WINWORD.EXE is not a Valid Win32 application

im having a problem getting inside Word97 everytime i try 
it, i get this errorr message:C:\Program Files\Microsoft 
Office\Office\WINDWORD.EXE is not Valid Win32 application

3.EXCEL.EXE is not a valid win32 application

Sometimes when I try to open excel directly, or by double-clicking an excel 
file, I get the error message "EXCEL.EXE is not a valid win32 application". 
The first time it happened, I tried repairing office - and that seemed to 
work - but the last time, I shut down and restarted the comp and excel 
started to work again. Excel seems to be the only app that does this. I use 
it quite a bit, and it's giving me flashbacks to windows 95's multiple 
reboots per day to keep things working ;)

I'm running office pro 2007 sp1 on vista sp1 (oh, and this started to happen 
after the vista sp1 install)

Jim

4.Microsoft Office\Office\EXCEL.EXE is not a valid Win32 application

Lately, In trying to open an excel file, or excel program, 
I get the referenced notein a pop-up box.  
Nothing eles opens.
Using Office 2000Pro and Win98.  All other files seem ok.  
Also, Microsoft automatic updater won't perform eaither.

Any clues?

5.Excel.exe is not a valid Win32 Application.

My system:  Vista Business 32bit with SP1, Office 2007 Professional with SP1.

For a while I was running Vista (without SP1) and using Office 2007 with 
SP1.  Rarely any issues.

Sometime after installing Vista SP1, I've been having odd issues with my 
Office installation, Excel especially.  I don't know if it's its SP1 related, 
or if it's just something went wrong with the Office install.

Here's the issue.  I leave my PC on 24/7 and simply lock it when I leave the 
office.  After several days, Excel will just stop working, completely.  When 
I try to launch excel I get the error "Excel.exe is not a valid Win32 
application".

I have tried reapplying SP1.  After reapplying the SP1 and rebooting, 
everything returned to normal.  So I thought.  A week or so later, same 
issue.  It turns out simply rebooting resolves the issue temporarily.

I thought my Excel exe was corrupted (i.e. some file wrote/deleted 
information from the binary file).  I verified modified dates with other 
excel exe's and everything is the same.  Nothing seems out of the ordinary.

I can't find any relevant errors in my event log.  I can't see anything out 
of the ordinary when using SysInternal's process monitor either.  It's like 
something in Vista thinks this EXE is a bad EXE and it won't let it launch 
until I reboot.

I have even noticed after several times of launching the exe, if I browsed 
to the installation directory, the actual icon for Excel was dimmed, as if it 
was like a hidden file or something.  WTH?  When I rebooted, it returned to 
the normal icon.  I have yet to see the icon dim again, even during times of 
issue.

I disabled my antivirus thinking it was the culprit to no avail.

What in the world could be happening?  When I use the process monitor, the 
exe never even gets executed (i.e. no events for excel.exe).

Please help!!!
-Matthew

6. MSIMN.EXE is not a valid win32 application

7. Install Error - BCM (setup.exe is not a valid Win32 application}

8. osa9.exe not valid Win32 application