ms dos computer has 2 lost allocation units

[ccdi]

Hello,

I need help.  When I start computer and it starts it setup it stops and has 2 LOST ALLOCATION UNITS FOUND 1 CHANINS.
CONVERT LOST CHANINS TO FILES Y-N, so here is where I should be able to type and I can't. It will not let me do anything, so I restart computer and hit the key to go to the amibios simple setup utility(ver 1.19), but can't find anywhere in setup to run the -CHKDSK- for fix my problem.  I have read in many places on the web that this will fix computer, but can't get to a C: or a CHKDSK file.   
Any ideas would be amazing!  Thanks you

[Linux711]

so here is where I should be able to type and I can't. It will not let me do anything, so I restart computer

Is it a USB keyboard. Sometimes you have to go into the BIOS and enable Legacy USB for it to work.

[ccdi]

Yes, I do have a USB keyboard, will try. Thank you, I am running a PC DOS, don't know if it makes any difference.

[Computer_Commando]

Sounds like System files are corrupted.  You'll have to boot to a Boot Disk and reinstall system files.
Get the version you need from here:  www.bootdisk.com
Boot to the floppy disk or CD.
Then type:  sys c:
Hit return.
Remove boot disk and restart computer.