Operating
System Not Found Issues
The operating
system not found error is not a pretty thing to see, but did you
know much of the time a few simple fixes can get your computer
back up and running in minutes.
So what can
cause this type of system boot problem?
Always power off any and remove
any mains power before working on any computer hardware. (in the
case of laptops remove the battery to)
1. One of the hard
drive cables has come loose.
On a desktop computer power it off and remove and re-connect the
data and power cables.
On a laptop computer remove the hard drive and simply replace
it.
Now check in the computers BIOS, can you see the hard drive? If
not then this looks like a terminal issue with the drive.
If you can see
the hard drive in the BIOS but still get operating system not
found read on..
2. Has the system
boot order changed?
Power on the computer hitting the F12 key, this will instigate a
boot menu, can you now see and select the hard drive?
If you can and
it boots up the next time you boot up the computer change the
boot order from the computers BIOS settings.
Now see if the
computer boots up
3. Chkdsk
If a hard drive is encountering read problems with the boot
sector then it will display the operating system not found
error.
Next you will
need to boot from the Windows CD/DVD and from the Windows
recovery console run CHKDSK /R
If you do not
have a Windows CD you can create a Hirens boot disk free which
will allow you to boot from this and run CHKDSK /R
4. Master Boot
Record
Its not uncommon for operating system not found errors to be
connected to MBR or master boot record problems, to fix this we
need to recreate the MBR from a Windows CD.
For Windows XP
with boot from the Windows CD and then select the repair /
recovery console, not login to the console using the
Administrator password, once logged in type FIXMBR this will not
delete and recreate a new master boot record.
At this stage
its also worth running FIXBOOT to replace the existing boot
sector just in case the issue is actually with this rather then
just the MBR.
If you are
using Vista or Windows 7 boot from the Windows disk and select
Repair Your Computer, When you see the Recovery Options select
the Command Prompt and type BOOTREC.EXE and hit enter.
Important Note
If you are have a computer with multiple operating systems do
not attempt to fix the Master Boot Record using the above
techniques or they could mess up the other operating systems
ability to boot as well.
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