Outlook 2010 cannot open or access the required PST file

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Microsoft Outlook
This morning a system has had a problem. When I try to open Outlook, I get the following error: "Cannot expand the folder. The set of folders cannot be opened. The file H:outlook.pst is in use and cannot be accessed. Close any application that is using the file, and then try again. You might need to restart your computer." I cannot use scanpst to try fo fix it. I receive the same message as above. I have rebooted my server. I have removed and reinstalled Office 2010. I have checked on Experts Exchange and have found no resolution.

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1. Repair the offline file with a Microsoft utility called SCANOST.exe. I’ve seen this file reside in a number of different locations, mainly within Program Files. It might be best to search for it with Windows or Google Desktop. SCANPST.exe will also work, though you’ll have to go digging for your outlook.ost, which should be near c:\Documents and Settings\%profile%\ Local Settings\Application Data\Microsoft\Outlook\outlook.ost. If your file is significant in size, you’ll save a lot of time with the repair operation by not creating a backup. Because if the repair finishes successfully and Outlook still bombs, you’ll need to…

2. Shutdown Outlook completely, including any runaway outlook.exe processes in the task manager. Open Mail in the Control Panel and before you delete your profile completely, write down the server settings! There’s no need to worry about backing up your mail as it’s stored on the Exchange server. (Essentially, you’re deleting that outlook.ost when you drop your mail profile.) Now, start Outlook and it will create a new profile, where you’ll configure the server with the information you wrote down previously.

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