When BKF files not open in Windows 7 and Vista because Microsoft removed some features from Window 7 and want to open BKF files in Windows 7 then try SysTools BKF recovery software which is an excellent recovery tool to recover corrupt BKF file after that you can easily open BKF files in Windows 7 as well as Vista. This Commercial BKF Recovery Software provide many stellar technique to repair corrupt BKF files like 1. Quick Scanning: you can select this option when you want to extract huge data in single fraction of time 2. Deep Scanning: This stellar option will perfect when you want to extract entire single files or folders in deep 3. Range based Scanner: without opening huge files extract only some part of info as per your need. Without thinking more & more about software try DEMO Version of software and repair entire corrupted files. After that pays $89 for Personal License or $180 for Business License.