System Not Booting - Operating System Wasn't Found Error

Aug 18, 2015

Whenever booting my pc I get a "operating system wasn't found error". I've checked to make sure my hard drive was set to the boot drive and I've tried reinstalling but that doesn't work either.

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I have recently upgrade to Win 10 from windows 7 and it was running fine until it started booting with the analyzing and repairing windows screen. I had tried to get out of it by windows repair and by system restore but there were no points to restore too. I ended up trying the windows reset which failed when I selected to leave my files so then I tried the reset including removing my files. It failed part way through saying it could not complete the action and now when I boot up every time I get "An operating system wasn't found" etc. I do not have a windows CD or know my windows registration number.

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Reset Failed - Operating System Not Found

Feb 23, 2016

My Acer Aspire One was upgraded to Windows 10. Eventually, I ran into some issues with the start menu not popping up, so I decided to run a clean reset of Windows 10. The reset failed, so I turned off the notebook. When I turned it back on, the message "An operating system wasn't found. Try disconnecting any drives that don't contain an operating system. Press Ctrl+Alt+Del to restart," popped up. My first option was to try to use either f2 or f12 to see if there was some way to get around the issue, but then I remembered that, recently, my notebook had stopped responding to those commands. I do have a USB Logitech K120 keyboard hooked up to it (since the original keyboard messed up,) but it had been working fine for those commands and such up until now.

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Lenovo ThinkPad T520 / No Operating System Found

Sep 21, 2015

so a while back when the Windows 10 Upgrade had popped up on my computer, I upgraded with no problem at all. I wanted to do a factory restore in order to clean up my laptop completely, however while updating, the power went out and the computer shut off. Logging back on, I couldn't access Windows at all. I couldn't even get to the login screen. The message that had popped up had said that no operating system was found and to press Ctrl+Alt+Del to restart. I have a Lenovo ThinkPad T520.

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Installation :: No Operating System Found And No Bootable Device

Jan 2, 2016

I upgraded from windows 7 to 10 about 2 weeks ago, absolutely no issues, i was happy with everything.

My computer had froze and i forced a shut down via power button. Upon starting again i was greeted with "no operating system found"

I fixed that problem now im greeted with a black screen with something like "no bootable device found please detach any devices"

What i have tried is....

Made a win10 usb with the media creation tool from another computer.

Startup repair does not work, error is "the hard drive is locked"

I have tried with the command prompt the following commands

Bootrec /fixboot
Bootrec /fixmbr
Bootrev /rebuildbcd
*rebuildbcd tells me i have 2 installed windows os. One is regular windows and windows.old*

(If i say Yes to rebuild both of those, my media creation usb stops working if i restart. I get the error 0xc00000f and have to recreate the media creation tool on the usb. Otherwise i keep getting the same error)

I have also tried different sata ports on my motherboard, resetting bios settings, changing boot order, changed sata cable. What else can i do?

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Operating System Was Not Found When Try To Wake Computer From Sleep Mode?

Jan 3, 2016

I did the conversion from Windows 7 to Windows 10 about 1.5 months ago. This is a Dell Vostro w/Intel Corei5 desktop

All was fine until I attempted to wake the computer from sleep mode recently and got the following error.

An operating system was not found. Try disconnecting any drives that don't contain an operating system

Press Ctrl+Atl+Del to restart

I disconnected the two external drives I had connected and tried again with the same result.

On startup, I've hit F12 to run through the Dell ePSA Pre-boot system assessment and it passes all the tests System, Cables, OS boot Path, Hard drive, cd rom drive, video card, cpu fan, system fan processor and memory.

I have the original 7, 64 bit installation disks, but nothing for Windows 10. What's the best way to get this thing going again?

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Networking :: Tcpip6 Not Found - System Error 2

Oct 16, 2015

Is it normal that if I type net start tcpip6 on the cmd the result system error 2, not found?

Also, I do not have the file tcpip6.sys on /system32/drivers. Why is that?

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BSOD :: Bad System Config Info Error - Forever Booting

Feb 10, 2016

First of all i was just cleaning my pc, ran a disk cleanup. I came across this program called driver booster from Clean, Optimize, Speed Up and Secure PC - Freeware Download - IObit, along with some of there other programs from it, i ran a norton scan, the driver booster, there defragging program and a full clean up program they offered. It was getting pretty late and the defrag program was on 40% and the driver booster kept prompting me to reboot after it had installed some drivers. I turned my pc off by accident and decided to go a bed. I woke up with the error bad_system_config_info, i had this problem before so didnt panic, i restarted, did startup repair which did not work, then booted up into safe mode which did not work, i tried some bootrec commands that some people over on reddit told a guy with the same error to do.

No fix, bootrec scannow and scanos did not find any windows installations which was odd and then i decided it was time to just give up and reset however it got to 30-40% and stopped, it said it could not reset and ran into a problem. I burned a windows10.iso to a disc and booted the pc with it and tried to reset with that, still stops at 30-40%. So im now here with little to no hope on getting my pc to boot and im posting this to hopefully get answers as my problem is very different from any others on reddit.

What im thinking is either it was the drivers that the program installed. The cleanup program also did a registry clean up which may have screwed things up in the BCD which ive heard is a cause of this error.

P.S i have windows 10, maker of the pc is zoostorm.

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How To Tell If Operating System Is OEM

Feb 28, 2016

A while ago I bought my pc off ebay. It came with windows 8 already installed. The guy who sold it said that he built the pc and decided not to use it so he was selling it. I've upgraded to windows 8.1 and now to windows 10. How can I to check if my OS is OEM?

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Desktop Operating System

Aug 16, 2015

Am I alone, or are there others out there who would like a DESKTOP operating system to use with their DESKTOP computers? Swiping, pinching, tapping, chanting arcane spells to your Cortana crystal ball, ... -- all these may be OK on a phone or tablet, but don't they just add to the effort of using a desktop computer?

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Installation :: 32 Bit Operating System To 64 Bit

Aug 1, 2015

Yesterday I installed windows 10 with 32-bit operating system, but now I want to change the operating system to 64-bit. I want to know if I can reinstalled windows 10 with 64-bit operating system?

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Corrupted Operating System - How To Fix

Apr 7, 2016

My Asus X453S has a corrupted OS. Well that's what tech support told me. When I turn it on it just goes to the start up display of asus then back to black screen. How to fix this?

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Migrate Operating System

Sep 12, 2015

I want to migrate my windows 10 installation from my SSD to a spare HDD (all partitions) so i can use the SSD for another OS how would i do this. and what software would i use?

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PC Reset And Now Have No Operating System

Aug 13, 2015

So I upgraded to Windows 10 last week, & after a few days decided I wanted to do the reset feature to have a nice clean install. I was also getting an annoying pop-up error that looked like some sort of malware, but virus & malware scans weren't getting rid of it.

Ok, so I do the reset, & opted for full clean not the quick one, just to make sure I got everything off there. It took quite a long time ( about 15-20 minutes per 1% progress), so I left it & came back later. When I got back I had an error message that said "There was a problem resetting your PC." with my only option being to click cancel. So I did. after that it brought me back to a reset screen, where I attempted to do the quick reset a few times, & it failed after a few percent each time.

At this point I decided to shut down & try again. When I booted back up I was greeted with the lovely message of "An operating system wasn't found. Try disconnecting any drives that don't contain an operating system. Press Crtl+Alt+Del to restart"...so my pc was wiped but the reinstall part failed somehow it seems, leaving me with nothing.

I created a bootable usb for Win10 from the Microsoft website, following their instructions to the letter. Installation seems to go fine ( Copying Windows files, Getting files ready for Installation etc). That screen finishes up & I get a Restarting in 10 Seconds screen. I let it restart & then I get stuck at a black screen with a blinking cursor in the top left corner.

I have done some reading on this & tried everything I found, nothing has worked. I've let it sit, tried hitting Crtl to type password then hit Enter, I've unplugged my second monitor & any non essential USB devices, everything. I've tried installing multiple times, to the same result.

Also worth noting that I was unable to revert back to Win7. When I put my 7disc in I get a message saying "A required CD/DVD drive device driver is missing. If you have a driver floppy disk CD,DVD or USB flash drive, please insert it now."

I've used this disc many times with no issue, & now I can't even reinstall 7?

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Installed 32 On 64 Bit Operating System?

Jun 17, 2015

downloaded windows 10 - 32bit instead of 64.Im just downloading the 64 bit now and burning to a disc will my laptop let me go back up to 64 even tho its current system is a 32?The laptop originally was windows 8 64 bit But can something that's gone down to 32 be put up to 64l

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Installation :: Cannot Locate Operating System

Dec 31, 2015

My dell 7500 has windows 7(C: drive) and windows 10(F: drive) installed on the single internal HDD. It also has three USB disks used only for data. When I boot I get a message saying that an operating system cannot be found and I should try unplugging my USB drives and then reboot. When I unplug the USB drives and re boot, it finds the windows systems and finishes the boot process with no trouble.
Checking the BIOS shows only the CD-Rom drive and the three USB drives are listed in the boot order and the drive listing. I then deactivated the "boot from USB drives" item in my BIOS and then the computer boots fine.

Also, I have been experimenting with Ubuntu on a USB pen drive but have removed it. I suspect that there are some parts of grub hanging around.

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Installation :: How To Move Operating System To SSD

Aug 27, 2015

I am looking forward to replace my laptop HDD with a SSD. My laptop is the Toshiba Satellite l70 pro 17.3". I have a basic idea of doing transferring windows 8 to an SSD but apparently it is harder to transfer Windows 10 to a SSD when compared to Windows 8 and 7.

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Installation :: No Internet And No Operating System

Dec 31, 2015

Not sure what to do. I did find a page to uninstall Win 10, but I'm not sure it would do it correctly without the internet. I'm not even sure if it would work because I was afraid to try it. It is a HP computer and it was running on 8.1. I'm using my spouse's computer to post this.

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Reset Operating System And Now It Won't Boot

Feb 10, 2016

I used the Windows 10 rest pc feature and selected the options to delete everything off of my drives. There was a problem during the installation and I clicked the option to boot back into windows 10. The laptop just boots into the MSI splash screen over and over again.

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Disconnecting Any Drivers That Don't Contain Operating System

Sep 23, 2015

I recently Factory reset pc with windows 10 on which has deleted windows 10 and everything else it seems bios deleted too when I turn it on and it starts up it comes up with "An operating system wasn't found, try disconnecting any drivers that don't contain an operating system"

How do I sort this I built this pc myself I got two disks one graphics card driver and another for the other drivers I think like the on board graphics, wifi etc... don't have a windows disk to place in tray but can find someone who does... will it work if I just place the windows 7 disk in?

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Games Won't Launch With New Operating System

Aug 11, 2015

I just recently got a new download of windows 10. As well purchased a video game at the same time. Movies had to get a vlc player. Instead of windows media player just playing the movies. I insert my new video game and there is no response from the player nor any chance to install my game.(s)

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System Thread Exception Not Handled Error - Cannot Get Into System

Aug 14, 2015

Installed Windows 10 (free) off Microsoft over Windows 7 home premium. System rebooted, started opening windows 10 and I received an error about system ra into a problem and needs to reboot.

Error was System_Thread_Exception_Not_Handled. After about 20 reboots and same problem error, gave up. Can't get into my system!

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