Does it boot from the CDROM if you insert a bootable CD?
If you deleted the drivers, then the system should try to load them again. If you actually deleted Windows files (they are from Microsoft, not LG), then you could them them from the installation CD or the Internet. You actually deleted C:\WINDOWS\System32\DRIVERS\cdrom.sys
and possibly these files as well?
C:\WINDOWS\System32\DRIVERS\imapi.sys
C:\WINDOWS\System32\DRIVERS\redbook.sys
C:\WINDOWS\System32\DRIVERS\stoprop.dll