For more Microsoft Outlook tips, check out TechRepublic's CD-ROM. Packed with more than 100 tips designed to help you better support your organization's Outlook users, the provides proven productivity tips to help Outlook users of all levels manage the powerful messaging and collaboration client.For those who support Outlook, PST file corruption can be an all-too-frequent occurrence. Such was the case for TechRepublic member Jpelillo, who suffered such a corruption when upgrading from Windows NT to Windows 2000. 'Why do Outlook PST files corrupt when switching from NT 4.0 to 2000 on workstations, and is there a patch to fix this problem?'