While you face BKF corruption errors then use of MS backup recovery software which is assistant for recovery BKF files. This tool easily solved user query like
Adolix
InnerSystem Software Ltd
SOFTOTEC
Repair PST
SysTools BKF Repair Tool
StellarFlare
Memory Card Data Recovery
Christopher Fillion
DataNumen, Inc.
Globe Softwares
MPI
Word Repair Software
Yama Software
Windine Software Company
The Elephant Backup Co PLC
Mightsoft Co., Ltd.
MyNetMedia
Aha-Soft