I recently upgraded to Vista and installed Office 2007. I cannot get Outlook
to work. I keep getting the following error messages.

An extension failed to initialize. Cannot open file: extend.dat. The file
may not exist, you may not have permission to open it, or it may be open in
another program. I am the administrator and the only person that use this
computer.

Cannot open your default e-mail folders. File access is denied. You do not
have the permission required to access the file C:\documents and
settings\HP_Administrator\Local Settings\Application
Data\Microsoft\Outlook\Outlook1.pst.

File access is denied. You do not have the permission required to acces the
file
c:\users\hp_administrator\AppData\Local\Microsoft\ Outlook\OutIMS\N-0000000a.pst


Can someone please help.
Thanks
Tonya