There is also another "System Restore" or "System Recovery" available on most prebuilt desktop and laptop computers.
Years ago, computer manufacturers supplied "Recovery Disks" with which to reinstall your OS, all necessary drivers and set the OS options to the same as they were from the factory in case of a disaster. Then the manufacturers figured out that they could save a few cents by including this data on a hidden "Recovery Partition" on the HDD. The instructions that came with the computer advised the new owner to create a set of "Recovery Disks" (CDs or DVDs) from this recovery partition. The idea was that if the OS ever got hosed, and the HDD was still OK, the OS, all original settings and drivers could be restored using the Recovery Partition.
However, in most cases, it was a HDD failure that caused the system to fail and the Recovery Partition was no longer accessible, and if the owner neglected to burn the set of Recovery Disks, he was SOL! Additionally, neither the Recovery Partition nor the Recovery Disks are capable of "Restoring" bad sectors on a defective HDD! In some cases, like Dell, if you tried to replace the defective HDD with something different than what the computer was built with, say a larger HDD, BOTH RESTORE METHODS WERE USELESS as the Restore process would refuse to work with "different hardware".
Since your HDD is defective, you fall into the latter class above. If you do not have any Recover Media, you MAY be able to purchase some from Asus, but I'm not sure of that. Again, a change of hardware may make the Asus Recovery Media useless. Check with Asus.
Failing that, there is always the option to buy a new copy of the OS from Microsoft or one of their dealers, like Newegg.
BTW, Tosh9090, it is not a good idea to post your e-mail addy in these forums. Web crawlers will find it and you'll get all kinds of spam! You should delete it from your above post.
Yogi