Boot problem

Hi.

So, some months ago i turned on the pc a "missing operating system" message appeared. Also noticed that a "no harddisk detected" message also appeared.

I went to the BIOS and the two hdd's are there and the boot order was ok.

Last week i created a bootable cd to attempt to repair windows but when i go to repair your computer windows 7 is not listed.

I hope i didn´t made permanent damage since i've reset the BIOS to default the first time I saw the problem.

I don't know very much about this and so i don´t know what to do.

Thanks in advance.

anything specific?

I've filled the more relevant ones.

Did you make any hardware changes just before this happened?

You might check the bios to see what configuration the SATA controller is in. You were probably running the default but if Windows can't see the drives, you may try changing it to the other, IDE to AHCI or the reverse.

Any chance you might have some type of virus? How old are the drives?

No I didn´t made any changes. I bought the computer in 2009 so the drives are not that old i think.

I can see the drives on the bios which leaves me with the virus option.. How can I scan for virus?

I'll give you the Windows Defender Offline link, but it still seems strange windows cannot even see the drives. Maybe using Partition Wizard to look at the drives might help.

But try this to see if it finds anything.

What is Windows Defender Offline?

ok thank you. i'll try that tomorrow