Page 1 of 2 12 LastLast
  1.    11 Jul 2017 #1
    Join Date : Aug 2016
    Posts : 375
    Windows 10 64 bit, 1703

    Repair MBR?


    I've been trying to sort out my CPU overclock lately and as Windows crashed and restarted due to an unstable overclock I neglected to to run the file scan that was presented on the next boot. It now appears my MBR may be damaged. It doesn't appear catastrophic but boot up is slower with the addition of the blue Windows logo and lot's of screen flickering. Also lockscreen features aren't working.

    I tried all available bootrec commands today in Windows recovery console but none were able to repair the MBR. Do I have any other options or does it look like a reinstall?
      My ComputerSystem Spec
  2.    11 Jul 2017 #2
    Join Date : Jul 2016
    Crewe Cheshire
    Posts : 1,466
    windows 10

    First of all do you actually have a MBR most modern systems use ufei and got disk? The MBR is the bit that contains the boot code so if your booting it's working. What error do you get and can you post a screenshot from disk Management showing details of the drive
      My ComputerSystem Spec
  3.    11 Jul 2017 #3
    Join Date : Aug 2016
    Posts : 375
    Windows 10 64 bit, 1703
    Thread Starter

    Ah yes sorry, must be GPT. Someone else I spoke to said your MBR must be damaged. I overlooked that GPT was newer.

    There's not really an error, just that boot up is bit slower with the addition of the blue Windows logo and screen flickering during boot.

    I seem to think this coincided with cancelling a file check after an overclock related system crash but now I'm not sure and it may have been like this longer than I think. Lockscreen features seem to affected as the Windows spotlight isn't working.

    Affected drive of course is C:, OS SSD.

      My ComputerSystem Spec
  4.    11 Jul 2017 #4
  5.    11 Jul 2017 #5
    Join Date : Oct 2014
    New Jersey
    Posts : 1,392
    Windows 7 Pro x64 Windows 10 Pro x64

    The logo, the spinning circle of dots, and the quick flicker (black screen for a nano second) are normal, what is your boot time ?

    If you reset the Bios to defaults or it did it on its own (which usually happens after a failed OC) then your Bios boot time will be slower (as per the timeout setting) but not windows boot time. Not sure why the logo didn`t always show up.

    Having all those drives and what not slows down boot time too.
      My ComputersSystem Spec
  6.    11 Jul 2017 #6
    Join Date : Jul 2015
    Posts : 3,755
    10 Pro

    Quote Originally Posted by Kol12 View Post
    I tried all available bootrec commands today in Windows recovery console but none were able to repair the MBR. Do I have any other options or does it look like a reinstall?
    In addition to the above there are a few other options.

    You can use macruim to repair the mbr or you can copy one from somewhere you trust.

    I enclose 2 here - one for use with AHCI (patched.bin) and one for use without (backup.bin). Boot from Linux and copy like this..

    Code:
    sudo dd if=patchedcode.bin of=/dev/disk0 bs=440 count=1
    1+0 records in
    1+0 records out
    440 bytes transferred in 0.002796 secs (157371 bytes/sec)
    backup.bin is Windows standard, patchedcode.bin adds AHCI. At your own risk but backup.bin is what Windows installs.

    This is default: backup.zip

    This patchedcode.zip changes IDE to AHCI as described here

    In either case it is only 440 bytes you copy. Perhaps there is more to it but it is beyond my knowledge.
      My ComputerSystem Spec
  7.    11 Jul 2017 #7
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,062
    Win 10 Pro (1703)

    Also note F: is RAW - possibly a symptom of an unreadable disk after upgrading to Win 10?
      My ComputerSystem Spec
  8.    11 Jul 2017 #8
    Join Date : Aug 2016
    Posts : 375
    Windows 10 64 bit, 1703
    Thread Starter

    Quote Originally Posted by AddRAM View Post
    The logo, the spinning circle of dots, and the quick flicker (black screen for a nano second) are normal, what is your boot time ?

    If you reset the Bios to defaults or it did it on its own (which usually happens after a failed OC) then your Bios boot time will be slower (as per the timeout setting) but not windows boot time. Not sure why the logo didn`t always show up.

    Having all those drives and what not slows down boot time too.
    Are you sure the logo and the spinning circle of dots etc is normal? In the past I recall going from the BIOS post straight to the lockscreen.

    Cold boot today with all of those drives still plugged in was 47 sec

    Restart with the two thumb drives disconnected was 27.7 sec

    In the past I've had boots as fast as 9.5 sec
      My ComputerSystem Spec
  9.    11 Jul 2017 #9
    Join Date : Aug 2016
    Posts : 375
    Windows 10 64 bit, 1703
    Thread Starter

    Quote Originally Posted by dalchina View Post
    Also note F: is RAW - possibly a symptom of an unreadable disk after upgrading to Win 10?
    The F: is an SD card inside a usb card reader...
      My ComputerSystem Spec
  10.    11 Jul 2017 #10
    Join Date : Jul 2016
    Crewe Cheshire
    Posts : 1,466
    windows 10

    If you have all those drive connected and set to auto in the bios it will have to goto each drive and request its info during boot which can take time if there is an option in the bios to set the drives to actual parameters it will be faster
      My ComputerSystem Spec

 
Page 1 of 2 12 LastLast


Similar Threads
Thread Forum
Startup repair couldn''t repair my pc BSOD error code 0xc0000221
I am getting a BSOD (Blue Screen Of Death) Startup repair couldn't repair my pc and when I tried to reset the pc wont repair the problems used all the troubleshooting tools which didn't work. Won't let me boot into safe mode. After I go though all...
BSOD Crashes and Debugging
Win 10 Repair Disc will not repair
Hi.... Thank you for the forum. Hope you do not mind my asking for help. Been trying and searching for answers for a couple of days... I have given up. We upgraded to Win 10 as the free update so have no disc..I think this will be the root of...
Performance & Maintenance
Windows 10 User files lost after attempting to repair automatic repair
Hello there So, two days ago I got stuck in an automatic repair loop after trying to enable an old soundcard connected trhough usb in my DAW software. I tried everything there is about fixing it (because reinstalling all the programs I got in...
General Support
Automatic repair couldnt repair your PC (Repair screen win10)
Hello My pc is :C440 Touch All-in-One (Lenovo) Operating system : Windows 10 I can't run my PC, every time i try to run it shows me blue screen wrote on it " Automatic repair couldn't repair your PC
Performance & Maintenance
How to repair a win10 ssd install with no driver for usb repair ?
I have two Windows 10 installations on my PC. Primary and temp. The primary installation cannot boot with error "The boot configuration data file is missing some required information ". This happened aftter I wiped out another third disk...
Installation and Upgrade
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 02:45.
Find Us
Twitter Facebook Google+ Ten Forums iOS App Ten Forums Android App



Windows 10 Forums