In rare cases when System/Partition Commander is installed into Windows NT, 2000 or XP, our OS Selection menu can be replaced by a Boot B- error.
Click on the "SCBOOT.zip" link at the bottom of this page. Save the file to an easily accessible location, such as your Desktop. Then, extract the SCBOOT.DAT file in the ZIP file to the C:\SC directory. You will be prompted to overwrite the existing file. Choose Yes.
For System Commander Only:
Disable System Commander (START->PROGRAMS->SYSTEM COMMANDER->UTILITY PROGRAM). Then re-enable System Commander. This will cause the new boot code to be written.