During the BIOS setup, it shows that my secondary hard drive's status is BAD...I don't know how fix this AND every time I transfer, install & download large files (200 MB & above) to my secondary IDE, a yellow triangular icon with an ! mark saying WINDOWS DELAYED WRITE FAILED always appear & stops me from transferring, slows my PC and I have to reboot. My secondary IDE have larger capacity (40GB) than my primary so I'm using it for storing large files. I have reformatted my PC several times because of this but it don't work, I can't install my OS in that IDE because it always crash at the middle of installation. Can I fix this through REGEDIT? HELP!!!!

How about its registry?

Thank you!

I think for once the bios may be right ,I guess to have SMART enabled on that drive ?,
first thing to check is the connections to that drive maybe (D ) ? and have you changed the jumper settings ? on that drive or added a cd/dvd on that channel , 
I call mine slave , and (C) master,  the politicaly corect folk will blow a fuse at that I guess ,
if all is OK , can you run error checking on the second drive ,
personaly I would try and save  files from the secondary drive ,
to your primary drive or to DVD if you can , as it don't look good on that drive ,

BTW follow mudmanc post