Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: An operating system was not found.

08 Nov 2014   #1
Vedanth33

Windows 7 Professional 64 bit
 
 
An operating system was not found.

I have an acer 5560 notebook with Windows 7 professional installed. I do not have any disks with the laptop as it is a second hand one. I tried to repartition my drive and once i finished, I put the laptop on hibernation. However now when I try to open it, it says An operating system was not found. Try disconnecting any drives that don't contain an operating system. I am not sure what to do. Alt+f10 doesnt seem to work either.


My System SpecsSystem Spec
.
08 Nov 2014   #2
Faladu

Windows 7 Ultimate Retail Box (64-bit installed) + Service Pack 1
 
 

The error with no OS:

You mean powering it up from scratch NOW or just after this hibernation back to normal attempt?

Remove power to it for 10 secs and then try it again and post results please.

...Making sure first it was not just a snafu on hibernation. [a mode I avoid myself]

If you somehow partitioned your way out of the drive being properly setup to boot, you'll likely need to download a Windows 7 image (same version you are using) on another PC and burn it to a disc, then boot from it.

They can be found here:

http://www.heidoc.net/joomla/technol...download-links

You need that disc to do the repairs on 7, see the tutorial on this issue, if needed, found here at Seven Forums:

Startup Repair

Via repartition process, it's possible it trashed the master boot record or boot partion or file, that's most likely what happened.

Worse case scenario is you make it a linux box instead, if the OEM Windows is totally hosed and new OS is needed and you don't want to pay for another Windows install, I am threating to do that to a used laptop I bought 3 years ago, myself, if the HD fails, has Vista 32-bit. 8( hehe
My System SpecsSystem Spec
08 Nov 2014   #3
Vedanth33

Windows 7 Professional 64 bit
 
 

Powering up from scratch. I have been trying to open it for the past 3 days.
My System SpecsSystem Spec
.

08 Nov 2014   #4
Faladu

Windows 7 Ultimate Retail Box (64-bit installed) + Service Pack 1
 
 

So the laptop goes through POST? (power on self test)

OK, you'll need to get that exact 7 version's install DVD image burned, to boot to and follow the repair tutorial.
My System SpecsSystem Spec
Reply

 An operating system was not found.




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
Operating System not found
I was using my computer normally in the morning and went to sleep for a few hours. When i woke up and turned on my computer, there was an error saying: Operating system not found, media check fail, check cable (something along those lines) i had recently installed an ssd instead of my hdd, and...
Hardware & Devices
Operating system not found...
I have a Sony Vaio VPC-EC2TFX/WI, Have tried rebooting several times with no change. This computer was working fine last night and when I tried to turn it on this morning, I got the Operating System Not Found message. Any help would be so appreciated!
General Discussion
'Operating system not found' HELP ME!!!!!!!!!!!!!
I need serious help guys. my 15 month old lenovo laptop will no longer boot up, it says 'operating system not found' when i plug it in a external caddy and hook it to another computer it shows as 19gb but the drive is 320gb. I cannot open it to browse its contents as it asks me to format it....
Backup and Restore
operating system not found and no drivers were found eror
as usual I turned off my laptop and after a while a turned on again to use my laptop but it couldn't reach operating system and showed error : " OPERATING SYSTEM NOT FOUND" ! I tried all instructions to solve the problem and finally run by windows start up CD to re-install new windows. this...
Installation & Setup
Operating system not found
My sony vaio is about 2 years old with a Windows 7 64 operating system. I changed the hard drive to a 500GB Toshiba. When I turned the computer back on it said "Operating system not found". I was told to turn off my computer and then restart while pressing F2. The new hard drive showed up on the...
General Discussion
operating system not found
I slightly droped my laptop on side of bed..wasn't a hard drop...now it says operating system not found..I bought the laptop from someobody so I don't have the win7 cd...so I tried instaling xp from booting from cd....but says hard disk drivers not found..I read somewhere that someone had this...
Hardware & Devices


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 14:48.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App