outlook 2007

My OS is win 7 64 bit and I use Outlook 2007.  I was running a mail merge to send emails and since it was taking a long time, I left the pc on while it ran for  a long time and just went to bed while it kept on sending.  but the next morning my pc was hijacked, see my Q at 2013-09-05 at 10:05:30ID28231543.
And this morning when I tried to open Outlook 2007, I got the following error :

Cannot open the folder.  The set of folders cannot be opened.  the file C:\users\Jothy\AppData\Local\Microsoft\Outlook\Jegajothy_msn10.pst cannot be accessed.  
You must connect to Microsoft Exchange at least once before u can use your office folder file.
Hope the Gurus can please advise how to solve this problem.  Thank u.
Who is Participating?
aadihConnect With a Mentor Commented:
Do a system restore. If you could, both your problems will be solved.
unknown_routineConnect With a Mentor Commented:
Are you able to connect to exchange server?

To make sure all is corrected in outlook remove your account and set it up again.

If while doing the above outlook gives you connectivity errors you need to contact your ISP.
jegajothyretiredAuthor Commented:
Thank u.
Great.  You got it working.  :-)
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