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Whenever I start my laptop there comes a black screen with message as shown in the image below.

enter image description here

After shutting down and restarting again and again 10-20 times (sometimes more than 20 times) it gets started and I always set boot priority as Ubuntu first and then Windows, but after this shutting down and restarting process the boot priority gets changed and Windows becomes the first priority.

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  • Hard Disk is visible in BIOS in the main section. Fixed HDD : (Value)750GB . And what do you mean by internal disk and cable ?
    – rittik
    Feb 21, 2015 at 18:22
  • Boot Order is LEGACY BOOT: Network, Hard Drive, CD/DVD
    – rittik
    Feb 21, 2015 at 18:25
  • Does boot order need to be changed ?
    – rittik
    Feb 21, 2015 at 18:31
  • What is the default order ? Why hard disk needs to be above network ?
    – rittik
    Feb 21, 2015 at 18:33
  • see my answer. Ill clean up my comments ;)
    – Rinzwind
    Feb 21, 2015 at 18:36

1 Answer 1

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Common reasons for this:

  1. you hard disk is not detected and the boot order in BIOS skips it and then ends up picking network boot (PXE is related to network). This can happen if the cable in your system that is attached to the hard disk is faulty or is not connected firmly. If you open BIOS and the hard disk is detected this is NOT the cause.

  2. Your boot order has a boot order where "network" comes before "hard drive". The item you want to boot off should to be the 1st in the line of boot options. (you could put the DVD 1st but it will take a bit of time for the system to skip booting from it and picking the next option). In general it is best to put the hard disk 1st and change the boot order when you need another option (like when installing from DVD/USB).

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  • I changed the BIOS settings. It's difficult to tell at this time if it works. If the problem mentioned doesn't repeat, I'll let you know .
    – rittik
    Feb 21, 2015 at 18:41
  • Now its showing black screen with message "Read Error_" only. What should i do now?
    – rittik
    Feb 22, 2015 at 2:33

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