Is chkdsk working>

Error Code Biohd-2 No Drives Detected errors are caused by missing system files or broken system registry structures. This is a critical sign of an unstable system that is typically caused by improper maintenance of the computer.
You could run the chkdsk disk utility
Click start run type cmd then type chkdsk/r/f which will scan for and attempt to repair any bad sectors and automatically fix any corrupt files on your Hard Drive.
or an easier way to run the chkdsk utility
Windows 7 chkdsk
http://www.w7forums.com/use-chkdsk-check-disk-t448.html
Click start control panel administrative tools computer management ,disk management right click on your drive select properties click tools click check now click start two boxes
automatically fix files and scan for and attempt recovery of bad sectors place then a tick in both boxes then select check now, start should schedule this task when restart
have no input while the chkdsk utility is in progress any input may further damage your computers Operating System and Hard Drive
http://download.cnet.com/jetclean/3000-18512_4-75627788.html
JetClean tidies your registry, gets rid of junk files, deletes broken shortcuts, and attempts to give your computer that like-new feel again.
Optimizers and Diagnostics.
http://download.cnet.com/360Amigo-System-Speedup-Pro/3000-18512_4-75332741.html 5E3422139C19CBED35C14826A44D4605
Improve your PC performance and fix errors.
If you are unable to get a connection with your hatd drive
Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer

If done properly the user should get to a screen similar to the below screen.
Select the option for Safe mode command prompt only
Windows Advanced Options Menu
Please select an option:
Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt
Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode
Start Windows Normally
Reboot
Return to OS Choices Menu
Use the up and down arrow keys to move the highlight to your choice.
Select safe mode with command prompt then type in chkdsk/f/r which will scan for and and attempt repair of bad files and bad sectors on hard drive
You should have no input while chkdsk utility is in progress any input might further damage your computer also
Use the System File Checker tool (SFC.exe) to determine which file is causing the issue and then replace the file.
Type the following command and then press ENTER: sfc /scannow The sfc /scannow command scans all protected system files and replaces incorrect versions with correct Microsoft versions.
You might have to use safe mode with Networking to download
Select safe mode with Networking to download

Step 1:
You could run the chkdsk disk utility Click start run type cmd then type chkdsk/r/f which will scan for and attempt to repair any bad sectors and automatically fix any corrupt files on your Hard Drive. or an easier way to run the chkdsk utility Windows 7 chkdsk http://www.w7forums.com/use-chkdsk-check-disk-t448.html Click start control panel administrative tools computer management ,disk management right click on your drive select properties click tools click check now click start two boxes automatically fix files and scan for and attempt recovery of bad sectors place then a tick in both boxes then select check now, start should schedule this task when restart have no input while the chkdsk utility is in progress any input may further damage your computers Operating System and Hard Drive http://download.cnet.com/jetclean/3000-18512_4-75627788.html JetClean tidies your registry, gets rid of junk files, deletes broken shortcuts, and attempts to give your computer that like-new feel again. Optimisers and Diagnostics. http://download.cnet.com/360amigo-system-speedup-free/3000-18512_4-75206713.html Improve your PC performance and fix errors.

If this is an error message
Click start control panel administrative tools computer management then select event viewer depending on what operating sytem you have this may vary

extend the events there you will see errors in red you will no what exactly what the error was and at what time it occured you might have to uninstall then reinstall the program and its files

uninstall the program, reboot your computer, and then install the latest version again from scratch.

until you know what the problem is you cant fix it or you might try
you could run the check disk utility

click start run type cmd then type chkdsk/r/f which will scan for and attempt to repair any bad sectors and automatically fix any corrupt files on your hard drive this should schedule to happen when you restart your computer then defragment your hard drive
another way of running the chkdsk utility
click start control panel administrive tools,computer management ,disk management right click on your drive select properties click tools you should see click check now click start two boxes automatically fix files and scan for and attempt recovery of bad sectors place then a tick in both boxes then select check now,start should schedule this task when restart
do not do anything while chkdsk is in process any input may damage your computer
or you might download and use this registry cleaner it is totally free to use
http://download.cnet.com/ccleaner/
hope this helps

Try to reinstall the system

For that when you power up the computer press F8 key then enter into safe mode and if you able to enter in safe mode.
Then first remove temp files from computer.
Go to start->run or press windows key + R key then you can see run type in run "%tmp%" then press ok then delete all temp files then type in run "prefetch" press enter delete all prefetch files.
Type in run "chkdsk /r" then press ok then press "y" then restart computrer then it fix error on harddrive.
Also scan computer with updated antivirus then it works fine.
But if you are not able to enter in safe mode.
Then you need windows disk for that insert that disk into rom then enter in bios and set first boot device as cd/dvd rom then save settings and exit from bios .
Then it boot with that windows disk.
Then follow the procedure on screen and choose options are when it ask for "Repair previous windows" .
Let me know if you need further assistance.
Thanks for using FixYa.

If you have any windows xp bootable cd use that to fix the problem by running the command chkdsk /r/f or you can try with this just restart the system in safe mode with command prompt and type the command like c:\windows>chkdsk
And
c:\windows>chkdsk /r/f

Run an Error check on your computer. Process takes anywhere from 1 to several hours, depending on hard drive size, files on computer and number of errors needing to be fixed. Manual steps to run Chkdsk at the command prompt loadTOCNode(3, 'moreinformation');

1. Click Start, and then Run.
2. In Open, type cmd, and then press ENTER.
3. Use one of the following procedures:
   • To run Chkdsk in read-only mode, at the command prompt, type chkdsk, and then press ENTER.
   • To repair errors without scanning the volume for bad sectors, at the command prompt, type chkdsk volume:/f, and then press ENTER.
     
     Note If one or more of the files on the hard disk are open, you will receive the following message: Chkdsk cannot run because the volume is in use by another process. Would you like to schedule this volume to be checked the next time the system restarts? (Y/N)Type Y, and then press ENTER to schedule the disk check, and then restart your computer to start the disk check.
   • To repair errors, locate bad sectors, and recover readable information, at the command prompt, type chkdsk volume:/r, and then press ENTER.
     
     Note If one or more of the files on the hard disk are open, you will receive the following message: Chkdsk cannot run because the volume is in use by another process. Would you like to schedule this volume to be checked the next time the system restarts? (Y/N)Type Y, and then press ENTER to schedule the disk check, and then restart your computer to start the disk check.

Try and tap F8 and see if you can boot to safe mode and go to my computer and rt click on C, and pick properties then tools, then
check for errors, and check auto,and scan.

Go to dell.com if you don't know who made the hard drive in your model. Then go to the mfg of the hard drive and download a hard drive diagnostic disk to check your hard drive for bad sectors.

You should go to dell.com and check your warranty and you can also ask dell what you should do.

This link posted below has a lot of drive mfg diagnostic tools.

http://www.tacktech.com/display.cfm?ttid=287