Outlook 2010 stuck on Verifying Data Integrity

A user's Outlook 2010 program when it is opened will take over an hour to go through Verifying Data Integrity. When it does reach 100%, The program will open for a second and then start the Verifying Data Integrity over.  We have tried using Scanpst.exe to scan the pst files and repair any damaged it found, run a repair on the Office Suite, open Outlook in Safe Mode, and with Outlook /cleanrules but it will not go beyond Verifying Data Integrity.  We have tried scanning the OST file but it just hangs.  Any assistance offered would be greatly appreciated.
regsampAsked:
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JohnBusiness Consultant (Owner)Commented:
Close Outlook, copy the Archive files (PST) and the OST file to a safe, non-Outlook location. Be certain of that the backups are intact.

Then open Outlook and use Account Settings to remove the Archive PST files. Close Outlook and delete the OST file. Restart the computer.

Now open Outlook. Does it open normally?

You can easily copy back the Archives and open them. They should be intact. See if this causes any errors.

Now allow Outlook to remake its OST file (may take a while).

I have asked you to delete files, so be VERY certain you have backed them up. I do this myself.

.... Thinkpads_User
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JohnBusiness Consultant (Owner)Commented:
Why do you have both PST file and OST file?   A main PST file is for POP3 use; an OST file is a cache for Exchange use. Two different things.

Are you on POP3?  Or Exchange?  (or with Outlook 2010, you can have two different kind of accounts in two different profiles).

.... Thinkpads_User
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regsampAuthor Commented:
We are on Exchange.  The user uses PST files for yearly archive.
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regsampAuthor Commented:
I cannot open Outlook to remove the Archive PST files as it will never get beyond Verifying Data Integrity but I can try the rest.  I will do so and then update Thinkpads.
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JohnBusiness Consultant (Owner)Commented:
You can copy the Archives and just delete them. Outlook may complain about that but deleting the Archives won't break Outlook.

.... Thinkpads_User
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JohnBusiness Consultant (Owner)Commented:
Another thing to do is to create a new Windows userid on the problem computer. Open Outlook and connect it to Exchange. It should open. Does it?

.... Thinkpads_User
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regsampAuthor Commented:
Okay, I will do that with the Archives and tried using a diff Windows user on the computer and Outlook opens without an issue.
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JohnBusiness Consultant (Owner)Commented:
The user may have a corrupted profile (not uncommon), so it the above (deleting and re-creating files) does not work, you may have to re-make the user profile.

... Thinkpads_User
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regsampAuthor Commented:
Okay, I will try a new profile if the deleting does not work..
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regsampAuthor Commented:
Deleting the OST file worked...Thank you!
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JohnBusiness Consultant (Owner)Commented:
Thank you and thanks for the update.
.... Thinkpads_User
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wilsonnj26Commented:
It is the problem with the PST file
Use "scanpst" and repair the PST after taking the backup of the PST
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