What should I do if invalid appears after reinstalling the win7 system?

What should I do if invalid occurs after reinstalling the win7 system?

Reason analysis: Generally, the partition table in the hard disk master boot record is incorrect. When multiple bootstrap partitions are specified (there can only be one bootstrap partition) or a virus occupies the partition table , such a fault will occur. The master boot record (MBR) is located at head 0/cylinder 0/sector 1. It is generated by FDISK.EXE when partitioning the hard disk. The MBR includes three parts: the master boot program, the partition table and the end mark 55AAH. , occupying one sector in total. The main boot program contains program code for checking the hard disk partition table, error information, error handling, etc.

When the hard disk starts, the main boot program will check the bootstrap flag in the partition table. If a partition is a bootable partition, the partition flag is 80H, otherwise it is 00H. The system stipulates that only one partition can be a bootable partition, so if the partition table contains multiple bootstrap flags, the main boot program An error message of "Invalid partition table" will be given.

Solution:

1. Boot from the CD. You need to use repair software. Download the DiskGenius software online to rebuild the partition table. First, use a system USB flash drive integrated with DiskGenius software to boot into DOS, and then start the Genius software; (ps system USB flash drive needs to press the shortcut keys F11, F12, F1 "different keys on different computers", etc. to choose to boot from the USB flash drive)

2. To rebuild the partition table, first use the [Alt T] key combination to expand the "Tools" menu, then select the "Rebuild Partition Table" command, and then press the [Enter] key to pop up the "Confirm Information" prompt message box. Press the [Tab] key to select the "Continue" button, and then press the [Enter] key to pop up the "Method Selection" prompt message box. Press the [Tab] key to select the "Automatic Mode" button, and press the [Enter] key to pop up the repair completion prompt message. box, press [Enter] key to confirm the operation.

3. Finally, press the [Alt D] key combination on the keyboard to expand the "Hard Disk" menu, select the "Save" command, and a message box popping up to confirm the update, press the [Tab] key, and select the "Yes" button , then press the [Enter] key to save the disk, and finally exit the Genius software. Then unplug the USB disk and restart to enter the system.

ps: DiskGenius software now has software for use under Windows systems, so you don’t have to boot into DOS when backing up the partition table.

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