Start windows with msconfig

msconfig is a tool to help you configure the Windows environment.
It is a semi-intelegent editor for the system files (autoexec.bat, config.sys, sys.ini, win.ini) and the registry.

bootlog.txt is a simple text file generated to aid in trouble-shooting startup problems.

If the PC does not boot in Windows, you cannot use msconfig at all.

Assuming that you can boot into windows, you could printout the bootlog file, and use msconfig to change your configuration to match the events in the old bootlog file.
Unfortunately, the events do not necessarily appear in msconfig in the same sequence as executed in a boot.

If you are trying to recover a non-booting system, you may be able to switch to the backup copy of the registry to get aprior configuration.

Chas