 <p>Well…try this steps:</p> <ol> <li>Open the "Start" menu and click "Computer" or "My Computer" depending on your version of Windows. Navigate to the C drive.</li> <li>Open the "Notes" folder. Double-click on the "Notes.ini" file to open it in Notepad.</li> <li>Place a semicolon (;) in front of the following two lines to temporarily disable VirusScan: AddInsMenus=NCMenu EXTMGR_ADDINS=NCExtMgr</li> <li>Click the "Save" option from the "File" menu. Close Notes.ini.</li> </ol> <p>Or visit: <a href="https://social.technet.microsoft.com/Forums/appvirtualization/en-US/612aacd1-c4ba-47eb-bf9c-0940d2ea1a05/lotus-notes-backup-data-nsf-file-corrupted?forum=itproxpsp" rel="nofollow">https://social.technet.microsoft.com/Forums/appvirtualization/en-US/612aacd1-c4ba-47eb-bf9c-0940d2ea1a05/lotus-notes-backup-data-nsf-file-corrupted?forum=itproxpsp</a> U can find info for solution this problem</p>