Desktop computer is not booting.

Windows 7 64 bit Home Premium.

Mostly likely MBR is corrupted.

I had created Recovery Disks (total 4).

Changed BIOS startup to DVD drive and started  boot using Recovery Disk 1.

Loaded files and then stopped on a screen showing the Microsoft symbol and message "Starting Windows".  Did not proceed or prompt for next Recovery Disk.

HP not provide any installation disks.

Need help urgently.