Windows 8 and 8.1 Forums


Dell laptop wont boot to windows after regedit mistake W8

  1. #11


    Just saw this thread. I guess you have tried the "restore to factory settings" option. Most dell computers have it. I run a couple or so dells, and it works for me. Unfortunately, you may have already destroyed the hidden and locked partitions.

    In case:
    As the computer starts, press <F8> on the keyboard until the Advanced Boot Options menu appears on the screen.
    Note: You must press <F8> before the Windows logo appears on the screen. If you press <F8> after the Windows logo appears on the screen, the Advanced Boot Options menu will not appear on the screen. If you do not see the Advanced Boot Options menu, restart the computer, and then repeat this step until you see the menu on the screen.
    3 Press the <Down Arrow> on the keyboard to select Repair Your Computer on the Advanced Boot Options menu, and then press <Enter>.
    4 Specify the language settings that you want, and then click Next.
    5 Log in as a user who has administrative credentials, and then click OK.
    6 Click Dell Factory Image Restore.
    7 In the Dell Factory Image Restore window, click Next.
    8 Click to select the Yes, reformat hard drive and restore system software to factory condition check box.
    9 Click Next.
    The computer is restored to the default factory configuration.
    10 When the restore operation is completed, click Finish to restart the computer.
    The software is now installed as it was when the computer was first received.

      My System SpecsSystem Spec

  2. #12


    Posts : 14
    windows 8


    Thanks Dave but 1st, F8 or shift+F8 has never worked for me that is why if you notice my last post, I needed to create a bootable USB file with an iso file of windows 8 32GB. I did this so it will boot and allow me to get into advanced recovery mode on windows from there.
    I can wipe everything now using the system reset option and lose all the data but considering I can access command prompt and the hard drive is not corrupt (I can see all my files in the E: drive which is where the OS is) I want to figure out how to simply reverse the registry edit that I made. I figure, I have another laptop to use and my most important files are on OneDrive so Im not in a big rush where I need it to be functioning right away and I also want to gain the experience of possibly fixing the issue. If anything this problem has already opened my eyes to a lot I didnt know so its worth it for me to try different solutions from experts like yourself.
    It would be great if you can give me an idea of how to just restore the registry to default settings or reset it to the last backup (regback, I think?) from the command prompt and than how to make sure the PC reboots in the proper method afterwards. If you need any info I'd be happy to provide it. Not sure if this makes a difference but I ran bcdedit.exe and it shows windows boot manager, device partition =C: and windows boot loader, device partition =E: and osdevice on partition =E:
    Thank you!
      My System SpecsSystem Spec

  3. #13


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    @Davehc
    I am not sure if F8 or SHIFT+F8 will work, Here's a list of functions key used by different manufacturers and if you look in the list, for Dell, it's F2 to enter BIOS, F12 for Boot Menu. No mention about F8.
    Boot Menu - USB Flash Drive

    @tech9
    What we've done so far, we've already replaced the registry with the backup copy so there's no need to get into command prompt. The reason I suggested using slacko so you can use drag & drop instead of having to type DOS command to copy.
    Now, if the system won't boot then there's something else and you did mention changing settings in the BIOS in your initial post. Depending on what style (Legacy or UEFI) the Windows was installed, you must set your BIOS accordingly.


    Keep in mind I can not access the OS on the Dell computer so Im creating the bootable drive from a different computer
    Is this PC also running Windows 8 ? if so, you can create a recovery USB disk from it and try to boot up with your broken PC. From there then you can run startup repair.
      My System SpecsSystem Spec

  4. #14


    Posts : 14
    windows 8


    @Topgun just want to show you how the program looks on my screen so I'm pretty sure there more to why it didnt work

    Click image for larger version

    Also it seems the error Im getting is saying read only system? What does that mean?
      My System SpecsSystem Spec

  5. #15


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    I can hardly read anything from the screenshot.
    Can you create a USB recovery from the working PC ?
      My System SpecsSystem Spec

  6. #16


    Posts : 14
    windows 8


    @topgun Thanks for getting back to me. So regarding the screen shot that is exactly how the display is showing up on the display so I cant read any errors or prompt messages clearly. What I seemed to get out of it was something about being in read only mode so it actually wasnt copying over the files like I thought it was.
    The PC im using is 8.1 x64 the Dell is 8 x32. If that will work I can give that a shot instead. I wasnt sure it was ok to be the same so instead was downloading a windows 8 iso and using rufus to put that on the usb instead.

    With that its gotten me in to advanced recovery mode by booting via the usb and choosing repair your computer on startup rather than install. I tried doing refresh your pc option 1st but it asks for a windows installation or recovery media, system restore showed an available restore point from a week ago but it gave me an error as well. I was able to get in to different folders and setting via cmd but didnt mess with anything

    The only way I was able to get slako or the win8 iso to boot with the usb by the way was to make the boot settings UEFI mode unsecure and than I had to change the peripheral device setting to "UEFI boot mode, legacy option rom on" so does that mean it is the correct method for this OS? How do you recommend I go forward?
      My System SpecsSystem Spec

  7. #17


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    UEFI style only works with Windows 8 X64. Since you have Windows 8 x32, you must use legacy mode. You need to set your BIOS to MBR style and boot from USB using MBR style.
      My System SpecsSystem Spec

  8. #18


    Posts : 14
    windows 8


    Ok so moving forward should I do the slako option again, windows 8 iso or from the 8.1 x64 pc? and once i boot in dell pc where do i go from there?
    Last edited by tech9; 19 Aug 2014 at 10:09. Reason: figured that out
      My System SpecsSystem Spec

  9. #19


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    Quote Originally Posted by tech9 View Post
    SO how would I choose that option on the dell boot menu?
    Normally from the Boot Menu, you would have 2 choices: Boot using MBR or Boot using UEFI.
    Here's an example:
    Click image for larger version
      My System SpecsSystem Spec

  10. #20


    [QUOTE=topgundcp;417265]@Davehc
    I am not sure if F8 or SHIFT+F8 will work, Here's a list of functions key used by different manufacturers and if you look in the list, for Dell, it's F2 to enter BIOS, F12 for Boot Menu. No mention about F8.
    Boot Menu - USB Flash Drive "

    Thanks, Topgun. I may be at cross puprose there. I am not referring to access of the USB, but returning the whole computer back to factory settings. This allows you on a dell, to reinstall the original OS from the hidden partition (if it is still there) See part 3 here:
    Restoring Your Computer´s Software to the Factory Settings | Dell US
    But, in any case. the op has discarded that method, as he states in post #12
      My System SpecsSystem Spec

Page 2 of 3 FirstFirst 123 LastLast
Dell laptop wont boot to windows after regedit mistake W8
Related Threads
Hello experts - hope you all had a great and tasty Thanksgiving - but this one is a doozy: I have a new Dell Optiplex 7010 MT with with 8GB RAM, a 500GB hard drive and an Intel Core i5-3470 CPU @ 3.20GHz – this is a genuine quad core processor with hardware virtualization. I am dual booting Win...
Hi, Yesterday my computer automatically updated and now it won't boot into windows with the following BSOD error: IRQL_not_less_or_equal It tries to repair then restarts and lands back on the same bsod. What are my options here? Thanks
Last night I updated windows 8.1 from windows 8. It got to the stage where it needs to restart so it done that started the configarations and once it reached 100% it restarted. Since then what happens is when i press power on the samsung logo comes on the screen then the black screen with the...
Hallo, After creating a UEFI bootable USB thumb drive with Rufus (using Windows 8.1 Enterprise ISO x64), for a Dell Optiplex 3010 (configured as UEFI only, no CSM, latest firmware version, Windows 8 installed), I didn't see a USB boot option, so I tried to add one manually. Unfortunately I...
Hi I need to access some files on my laptop but I cannot for the life of me get it to boot. Over the last few days I was receiving kernel page error blue screens which restarted my computer but once I stopped using google chrome it seemed to solve the problem. However earlier today the blue screen...
Hey guys, I received my laptop (Dell 17r SE) about a week ago but I have been having trouble with it's boot time. From pushing the power button, it takes anywhere between 5 and 10minutes to arrive at the login screen. I checked the event log for Diagnostic-Performance, and the eventID100 has...
Solved dell inspiron 5720 wont boot in General Support
diagnostics says all is fine no problems found. I can boot to bios... cant boot to safe mode. any ideas how to fix? so far im finding nothing on google.
Eight Forums Android App Eight Forums IOS App Follow us on Facebook