How to fix “invalid partition table” issue on Windows?
by Ritesh Morisson staffInvalid
partition table causes problems like partition loss and system boot issue. Do
you have any ideas on fixing invalid partition table on Windows 10/8/7/XP? This
instruction will help you solve this problem through multiple methods.
Symptoms
of invalid partition table issue
Partition
table is stored on hard drive, containing information which is used to describe
partitions on the disk. Usually, partition table is talked about with the term
MBR (Master Boot Record). MBR partition table is one of the most widely used
disk partitioning format.
Operating
system reads information in partition table to access partitions and files in
each partition, as partition table stores partition numbers, location, size,
partition type, etc. If partition table gets corrupt or invalid, operating
system won’t be able to access partitions, including system partition, which
means the boot process cannot continue.
The
invalid partition table error mainly appears during a failed system booting
process, and you can see words “Invalid partition table” on black screen.
Causes
of this Error
The warning “Invalid Partition Table”
Windows 10 on startup or installing appears mainly due to the following
reasons:
The boot sequence is wrong.
The BIOS is out-dated.
There are two or more partitions are
marked as active partition on the hard drive.
MBR
(master boot record) is corrupted.
How
to fix “invalid partition table” error?
Solution 1: Rebuild the MBR with PartitionGuru
This software is able to fix invalid
partition table by rebuilding MBR. A partition table saves data with 64 bytes
structure which offers basic information for computer’s operating system. Since
the PC cannot boot to system now, the MBR rebuilding should be down under
Windows PE environment.
Step 1: Create WinPE bootable USB drive of
PartitionGuru.
Step 2: Boot your computer from the
bootable USB disk.
Step 3: Rebuild MBR (Master Boot Record).
Solution 2: Rebuild MBR using
Command Prompt
If you have a Windows installation disc,
you can fix invalid partition table via Command Prompt, here are solutions:
Step 1: Insert installation disc into your
computer and boot PC from the disc. Click “Repair your computer”
Step 2: Select Command Prompt in the
“System Recovery Options” window.
Step 3: Type “bootrec.exe” in Command
Prompt and press “Enter”.
Step 4: Type “/FixMbr” on Windows. Restart
computer and check if the issue is fixed.
Solution
3: Change the boot sequence
If your computer contains more than one
local disks or external disk, many times, the invalid partition table is likely
to happen due to incorrect boot order. On such occasion, you should restart
your PC and enter Boot Menu where you can set disk boot order. Make sure your
computer is booted from correct disk, save changes and restart computer.
This
guide presents three solutions to repair invalid partition table step by step,
and you can try them one after another. If you have partition table backup, you can
directly restore partition table without trying any repairing operations.
http://www.eassos.com/how-to/how-to-fix-invalid-partition-table.php
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Created on Dec 26th 2017 20:39. Viewed 216 times.