Boot manager for vista

Hello,

I have a Dell inspiron laptop with vista home premium os. Recently I was working with a data recovery program called Testdisk on the data on a WD external hard drive and after I finished shut down the computer. When I tried to restart I got some flashing message about loading something, then got the screen with prompts for test memory, test system, and exit and every time I select exit, the computer switches off and restarts with the same screen for test prompt. Fortunately I had the original recovery CD and ran it. When I tried system repair I got the root cause found as Boot Manager is missing or corrupt and error code 0x15. Please let me know how I can restore the boot manager without losing all the data on my hard drive, which has the main C and a backup D partition.

When I tried to boot the system from the recovery CD it could not identify the resident system and asked to load some drivers which I was not able to understand.

Will the ultimate boot help?

Thanks