Hi Kado,
Yes, you are right. Strangely, my computer backup was placed in HP-Tools. Although this virtual disk is related to the backup, but the backup file shouldn't have been there. So I called HP and the technician cut the backup file from HP-Tools and placed it in my "Document" directory as a default file and problem is apparently resolved. But I didn't find this backup file in default programs. And I also don't know, for the automatic periodic backups, how HP can find it in my document folder and place the new backups in there. Thanks a lot for your very helpful input and I appreciate if you could comment about the new situation.