Backup_Migrate Module able to Create Backups but NOT Restore them
Please try with the Patch mentioned on following URL:
https://www.drupal.org/node/2320969#comment-9564267

Patch for make full site restore (and full site backup) work on Windows. The main 
problem was in assumption that directory separator is always '/' but that's not true on Win. So wherever i've found '/' in operation on paths i've changed them to DIRECTORY_SEPARATOR constant. 

Thanks!