please help, error loading operating system

Hi,

sorry for writing in English.. it's all because of stupid winxp

I did search before posting.

The problem is : I connected a second hd to my mother's pc to copy a few files. Then after copying I started getting a lot of errors from windows. I restarted and got error loading operating system.

Now after few hours of trying to solved this, I decided to install winxp on my second hd and backup the files from the first hd.

Problem is, windows is telling me that the hd is not formatted.

I'm pretty desperate..

note that the first hd has two partitions and that the second partition is working fine...

Thanks