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I power up the computer and get ''operating system not found'' on the screen.

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The operating system not found error message is one commonly seen by techs and non-technical people alike. If you run into one, it may not be a problem at all. Here's an example:

If you're installing a new operating system to a hard drive or partition, or have just installed a new mother board, chances are you aren't alone. Most of the occurrences of the operating system not found error occur during these processes. In many cases, this is simply BIOS related, and can be changed very quickly (and remedied) during the Boot process. There are a wide variety of occurrences of this error, so if you have recently been "tinkering" or have installed a new operating system, take heart, there are many computer forums on the subject which may be able to point you to an answer.

Another reason why you may get an operating system not found message, is due to a damaged or incorrectly formatted partition. If your computer can't read the partition, then all data stored within that partition cannot be found. This includes your operating system. To solve the problem, you may need to look into partition recovery.

There are instances, however, when the operating system not found error occurs because of file system error, or worse, hard disk drive failure. If this is the case, you may require professional hard disk drive recovery, especially if you were not changing the system details recently, and were just working as normal.
When To Suspect Hard Disk Drive Failure Certainly, there is an explanation for everything, and the operating system not found error can be explained very easily. First, check your floppy disk drive. Is there a disk in it? In cases where this occurs, simply removing the floppy disk will likely solve your problem. Your computer may have been looking for an operating system on the floppy, and as a result, you were handed an error message. Removing the floppy disk should fix your issue.

If there is no floppy disk in your drive, it may be time to check the boot sequence. You can do this in your BIOS. First of all, does your hard drive get detected as the primary hard drive? If it does not, your hard drive may have in fact failed. If it does, move to the Boot Sequence section of the BIOS. If your hard drive does not show up within the first three boot devices, you probably have a problem. Adjust your BIOS accordingly.

Can't Find Hard Disk Drive Either

If you've done these preliminary checks, and are still receiving the operating system not found error, you could be facing hard disk drive failure. If this is the case, remember : DO NOT PANIC. 99 times out of 100, your hard drive's data can be recovered by a professional firm. So rest easy. Then try this test if you have another computer system available.

First, disconnect your hard disk drive from your system, and connect it to a system you know works as the slave drive.

Second, boot up the system and go into Windows explorer. If you can see the drive, you may not have a problem at all, or have one which can be fixed with simple data recovery software tools (Do a search on Google for data recovery software tools for a selection).

If, on the other hand, you cannot see your drive, you may want to consult a professional hard disk drive recovery shop like Hard Disk Recovery Services. Contact us here for a hard disk drive recovery quote, and we will usually be able to diagnose your problem over the phon

Posted on Jun 02, 2010

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The pc has crashed and must be restored, either by reinstalling the os or using restore disks if you have em

Posted on Jun 02, 2010

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It could be your hard drive has failed or become disconnected.

1) Check your boot priority in the BIOS. (Press DEL or F2 (Normally but there could be others) While booting) and ensure you have the correct boot order, I'd suggest CD drive 1st, HDD 2nd, Floppy or external 3rd.

2) If it still can't find the the o/s, disconnect all power, take the side or top off your tower and check the ribbon connectors. both ends should be connected and home one end on the motherboard the other on your hard drive. there is another ribbon, one end on the mother board the other on your CD/DVD drive.

If both connectors are home and good you've probably got a hard drive problem, if one was loose, you've probably resolved it. Unless .............................

3) You need to re-install the o/s because its been removed. (This will wipe the hard drive of all data).

Posted on Jun 02, 2010

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First check if u have any optical disc in any drive(means dvd or cd) ,then if u use to harddisk,check for the booting harddisk in the bios

even check that u dont have any external HDD or a pendrive/flash drive or any other storage device attached

then restart ur pc

hope this would solve the problem if not i m sorry ur harddisk if not detected than u need to buy a new harddisk or if deteched than just need to reinstall

good day

Posted on Jun 02, 2010

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1 Answer

Operating system not found


hi goodner,

getting the error "operating system not found" means that the hard drive where the Operating System is installed (i.e. Windows XP, Windows Vista, Windows 7), Cannot be found by you BIOS upon the boot sequence.

When you turn the PC/Laptop, you normal see a screen that flashes flashes with screen that displays the ff:

Primary Master:
Primary Slave:
Secondary Master:
Secondary Slave:

The Primary master should have a value right next to it. If not, either the hard drive is faulty and needs replacement, cable is loose,

If you have a value to it and stil gets the same error the operating is corrupted and needs to be re-installed.

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Operating system not found


Unfortunately, Acer PC's do not come with an Official Microsoft Install Disc, however, you should be able to reset the computer to its original factory setting(s), by pressing either F10 or F11 at the initial start-up of the computer, not the start-up screen of the operating system. If this does not work, even though it should as long as you have not altered the HDD internal disc drive to the point to were you would have removed this factory installed reset function. In the event that this setting is not found or available, one other option is to connect an external CD/DVD-ROM Drive to the computers USB port load a copy or an original Microsoft Install Disc into the CD/DVD-ROM Drive. Turn your PC on and at the initial start-up screen of the computer, not the operating system start-up, access the computers bios screen, or boot order screen and adjust the computers settings to boot initially from usb port/external hard drive/CD?DVD-ROM Drive. If your computer allows you to do such, you should be able to re-install the operating system, be it the same or a newer windows version or some other type. NOTE: If you have the know how, you can download free operating system online for free, and creat your own "boot-able" flash drive...

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1 Answer

The computer does not boot into the operating system and displays "Operating System not found."


Hi,
For that problem, do this first check-up your bios setting.
Power on your PC laptop
, when screen popped up ( press F2, delete etc. ) to get into standard bios Setup you see there if your hardisk drive detected or not detected. if not detected try to open your Laptop PC ( need power off. open cover at the back of your laptop ) check-up your hardisk drive for loose power cable, data cable hardisk Some burn , noise hardisk sound ) if detected, your operating system corrupted. you need to Reinstall your operating system like windows xp, windows 7 or linux base operating system. try that Solution first.

Just let me know if not yet working your laptop PC.
Regard.

Aug 26, 2011 | Toshiba Satellite M30 Notebook

1 Answer

Operating System Not Found on VAIO Laptop


The disk-drive inside the computer has ceased to function (or has ceased to have connected "power" and "data" connections) -- thus, the Operating System cannot be read from the disk-drive.

Take the computer to a qualified technician; there's nothing that you can do "inside" your computer.

Jan 20, 2010 | Sony VAIO VGN-AR150G Notebook

1 Answer

Compaq Presario S3040SE PC Desktop was working fine. when i turned it on next day screen says operating system not found. restart. now monitor wont kick on and hard drive light doesnt come on. only power...


Normaly when you get the error that the operating system cant be found, it is a indication that the hardrive has either gone bad, or somehow some of the system files got deleted. I would say though since the hard drive light wont come on it could be the hardrive has shut down completely. But you still should see the company image of your computer when you start it up, (the bios screen)

A bad hardrive would be my first guess, 2nd problem if its not your harddrive would be a new power supply.

Dec 31, 2009 | HP Compaq Presario S3040SE (DF222AR#ABA)...

1 Answer

Operating system not found


When you power up the computer press F1 ore F2 or "del" key toenter in bios then check your hardisk is detected or not.
If not then if you have desktop open cpu cabinet then reconnect power cable and ide or sata cable to harddisk also check your harddisk is set to master.

Jul 29, 2009 | Microsoft Windows XP Professional

1 Answer

Operating System Not Found


Hey,

windows is not properly installed on the computer, you will need to use the windows installation disc or recovery media that came with the computer to restore it to the original state.

If you don't own either, you can take the laptop to a professional who can reload windows for you.

Or get your hands on a windows installation cd to solve the problem.


Let me know if you need anything else.


Thanks,
Ekse

Feb 24, 2009 | Toshiba Satellite A105-S171 Notebook

2 Answers

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On my Windows 7 laptop, I have got "Operating System not found" error. to fix problem, Windows Boot Genius helped me finally!

Mar 15, 2008 | Gateway M305CRV Notebook

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