The utility modified the master boot record (MBR) or installed a custom boot manager (such as GRUB4DOS) ahead of the standard Windows Boot Manager ( bootmgr ).
Multiple security scans have flagged this specific version as a threat. On various malware databases, the executable for version 3.503 has been classified as: Windows 7 Loader eXtreme Edition 3.503
: The boot sector calls the loader, which then calls the original boot loader. The utility modified the master boot record (MBR)
: If the loader prevents Windows from starting, use a Windows recovery disc or command prompt to run bootsect commands to restore the original Master Boot Record (MBR). Windows 7 Loader eXtreme Edition 3.503