Harddrive is not detected,Something RAID problem, Help Me.

[KRISHI101]

Hello everyone,
thank you for your attention.
I got serious problem recently.
I just start pc normally as i do everytime,but it wouldn't start.
The problem is window cant start,because it cant find any harddrive.
I have motherboard of VIA/MSI.
The problem is shown when pressed 'TAB',it says something like warning type message-"Raid-the number of disks are not adequate."
so now what i have to do.
Whenever i start pc.
Onscreen last message apear is..
Window cant find config.sys
insert setup cd,and press r for recovery...
Help me..

[KRISHI101]

And ya more,
i have segate baracula hdd, with 160gb capacity.
Please inform me if anything i not mentioned.

[desiibond]

Reset BIOS and disable RAID if you were not using RAID before the problem started?

[KRISHI101]

I havnt changed anything.
And the Raid is default in use.
And how do i reset Bios.?
Is it necessary,or anything hardware problem internal.?
As i told i normaly start pc & the problem is occured unexpendently.
I think the problem is for Raid,
as i told,it says warning msg- raid.The no. Of disk is not adequate.
Thanks for ur reply

[desiibond]

Remove the CMOS battery that is on the motherboard.

How many HDDs do you have?
Did you setup RAID before on your PC?

[desiibond]

Remove the CMOS battery that is on the motherboard.

stay for 4-5 minutes (don't turn on PC)

Insert the battery again and BIOS will be reset

Another method is to go to BIOS setup and load default settings.

[KRISHI101]

Is it risky?
Bcoz i never done it before.
And no i never changed any raid settings.
And why it happend at once,i just started it after 1hr.
(I hate this,
wht happens sometime to these things suddenly.)
i will try to reset or load settings.
But why it happend suddenly i cant understand.

[desiibond]

not at all risky. Try it out and let me know.