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Unable to past the welcome screen in Vista 64bits

A friend of mine brought me his computer yesterday.  The computer reboot during the welcome screen just after login in.
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Alain_Henri
Asked:
Alain_Henri
1 Solution
 
fmhaCommented:
This happend with me when i had Vista, it is mostly a virus got into the system this requires to reinstall Windows.
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Jackie ManCommented:
If the problem appears recently, you need to use a Windows Vista Recovery Disk or use your Windows Vista Setup DVD to start your PC and launch system restore to go back to a restore point before the WIndows Update.

URL: http://www.sevenforums.com/tutorials/668-system-recovery-options.html

When a problem appears in Vista and Windows 7 and there are no clues from google, it seems to me the last resort is to use system restore as Vista is much better in system restore than the system restore in XP. System Restore in Vista is just like a time machine to go back to the exact state when the problem does not exist. But the drawback is that it consumes a lot of hard disk apace and it will restore the applications that you have removed and old version of document on desktop,

So, before your use System Restore, make sure all user data has been properly backup as it is just too powerful if Vista thinks that the path you stored your data is part of the system folders.

In a nutshell, System Restore can reduce the time of troubleshooting (except the problem is caused by hardware failure) but it must be used with due care.
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Alain_HenriAuthor Commented:
How to use the VISTA original DVD to restore to a previous state.  Each time that I start with that DVD, it just ask to reinstall?

When I go on the mentionned site, everything that I see applies to W7, does it work also for Vista?

Thanks for the quick response.
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Jackie ManCommented:
http://www.bleepingcomputer.com/tutorials/tutorial142.html

Do you see the repair my computer word at lower left?
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Alain_HenriAuthor Commented:
Sorry about that, must be blind for a while, looks like a beginner now.  Anyway, I have restore the system to the previous point (before the problem occurred) but it still does the same thing.

Since the restore point did not work shoul I tried the "Startup repair" or go for the oldest restore point?
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Jackie ManCommented:
You can try startup repairs but my wild guess is that there will be not much difference.

Have you tried enter F8 on startup and boot into safe mode?
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Alain_HenriAuthor Commented:
I have no problem booting in safe mode.  

I ran Malwarebytes few times so far.  

At first I cleanedd the whole thing (just before the restore) since I did a restore point Malwarebytes found few others corrupted files.  

So right now I am scanning the computere again.
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Jackie ManCommented:
Run msconfig and in the service tab, look for any service for anti-virus software and remove them as startup service.
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tmoore1962Commented:
Will it boot up in safe mode with networking?? If so then download and scan with malwarebytes.  If not do you have a AVG emergency CD handy?? If not you can download the free version from the AVG website and make on on another system, follow the instructions to boot from the CD and run a full scan, or you can try and boot to the recovery console and run regedit to make sure your  HKLM\Software\Microsoft\Windows NT\Current Version\Winlogon\
   Shell = Explorer.exe
   UIhost= Logonui.exe
   Userinit= C:\WINDOWS\system32\userinit.exe,
If it boots into safe mode and these values are correct then run msconfig and disable the startup items and see if the system will boot, if it does then something is startup is causing the issue and through process of elimination you can determine the culprit
   
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Alain_HenriAuthor Commented:
Unfortunately nothing that was suggested have worked and at the end I had to reformat the drive and reinstall the OS.
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