The last time I saw this, the .PST file was readonly. With Windows NT/2000/XP/2003, you would also check permissions and ownership.
Did you truncate that "c:\windows\...\outlook.pst" portion of the message? Remember that Outlook can put the .PST almost anywhere. Is it where it thinks it should be?
i'm running windows 98 and outlook 2000. when i open outlook 2000, it looks okay. for the first few seconds i can view/delete messages with no problems. but when the reminder windows open up, outlook displays an error message saying c:\windows\...\outlook.pst could not be accessed. from this point on, i can't check mail, delete messages, etc.
i ran microsoft's inbox repair tool (scanpst.exe), but it said it didn't find any errors in the pst file. the microsoft site says that if i was getting the 'could not access ...outlook.pst' message, and if scanpst.exe didn't find any errors, that i should run their 2gb pst truncation utility. however, the pst in question here is only 600mb.
has anybody else encountered this problem? any suggestions on how to proceed?