Windows Hangs after Login Screen

We are having a problems with all our laptops hagging on the blue login screen after computer is logged in.  The only way to get past this is by ending explorer.exe and restarting it to get into windows.
I have tried:

-virus scans
-adaware
-disk check
-disk defrag
-disk cleanup
-deleting uneccesary programs and files
-windows updates
-changing what starts up on msconfig
-page file size increase
-checked memory size to make sure its enough
-changing profiles
-removing laptop from domain, renaming and adding it back

this trend is happing with all the laptops on our domain, so we can't manually format and reinstall them - any ideas you have would be greatly appreciated
FreemanWhiteAsked:
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moduloConnect With a Mentor Commented:
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modulo
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FreemanWhiteAuthor Commented:
i just took a look at the link - i have tried everything there except doing a full format and reinstall of windows (our laptops with the issue are running 2000,  not XP) -

the situation is so odd, because the trend runs only in laptops and many a day are starting to have the issue

any ideas?  thanks again for your help
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jwalkkingCommented:
Does it happen with all user profiles on those systems?
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FreemanWhiteAuthor Commented:
Yep - i have logged on with multiple profiles (some who have logged on before and some who have not - all with different rights incase it was related to the profiles that aren't domain admins on the network)...
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jwalkkingCommented:
Does this happen when you log into the machine and not the domain?
anything in your Security logs for the domain?
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jwalkkingCommented:
Are you using roaming profiles? Do you use VPN for these users that are now having issues?
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FreemanWhiteAuthor Commented:
happens when loggin in with or without the domain - only time it doesn't happen is when i log in with safe mode - nothing in logs
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jwalkkingCommented:
Run Regedit
Start->Run
regedit

navigate to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Windows NT\CurrentVersion\WinLogon

Double click on the "Shell" Key
And make sure the data reads
explorer.exe

If the key does not exist, add it
its of type String
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FreemanWhiteAuthor Commented:
ok - found the solution -

msmsgs.exe was running in multiple instances on the computer in msconfig under processes and under startup - it turned up that a virus was actually behind the scenes running within msmsgs.exe - neither of the anti-virus's that i ran found it, but when i deleted every registry key related to msmsgs.exe - the computer logged on fine....

thanks a bunch for your help and support

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