win10 system is also upgraded how to solve the reinstallation

1. Make sure win10 is activated.

Under normal circumstances, as long as the system can be automatically activated after upgrading from windows7 windows to windows10, then it can also be automatically activated after a new installation of win10, so first make sure that the system has been activated. You can check the activation status in the system settings Update & Security activation, and you can also see the system version here.

2. Use the correct ISO image.

When installing a new one, you must make sure that the image version you are using is the same as the system version you are using, if you use Microsoft's official tools to upgrade to Win10 and create an ISO image, then you don't have to worry about this problem. If you want to mirror the image yourself, you need to pay attention.

In addition, there are no restrictions when choosing the system architecture, either 32-bit or 64-bit. However, it should be noted that if the computer is UEFI booted, the image must be consistent with the current system architecture. Determine if UEFI is initiated.

Generally speaking, tablets, laptops, and desktops with Win8 pre-installed are all launched by UEFI by default.

3. Preparation before installation.

During the installation process, you only need to format the partition where the system is located (usually C drive), so you need to back up all personal files in the partition where the system is located in advance, and the content in the desktop is also in the partition where the system is located by default.

4. Make a USB flash drive boot disk or boot from the hard disk to install win10

5. Network activation.

When upgrading from win7 to win10, Microsoft will save the activation information on the server, after reinstalling win10, the system needs to compare the hardware information with the information saved in the server, and the comparison can be automatically activated after the comparison, so you need to connect to the network.

Note that you may need to wait a while for automatic activation after being connected to the Internet.

It is possible to revert directly to the previous system. It is also possible to choose to reinstall the system yourself. There are a few different ways you can revert from Windows 10 to a previous version of Windows

Within a month of upgrading to Windows 10, you'll be able to go back to a previous version of Windows from Settings> Update & Security, > Recovery.

If your PC manufacturer offers this option, you might be able to restore your device to factory settings.

If you don't have the option to go back and do a factory reset, you can install a previous version of Windows using Install** and a product key.

For more information and instructions on how to revert to a previous version of Windows, see the official website.

Steps to reinstall win7 system after upgrading win10:

1. Reinstall win7 after upgrading directly from win7 to win10.

1) Upgrade win10 can be returned directly within one month.

1. Start by opening the "Update & Security" option in the system settings.

2. Then click on the "Recover" option in the left menu.

3. On the right side, the button to go back to win7 is displayed, click the "start" button.

4、Then it will make the choice to fall back to win7 reason,Just choose here at will,And then click Next。

It's a good idea to back up things that need to be backed up first, and then click next.

5. Then prompt the login password problem, if you set the password before upgrading win10, then the rollback to win7 will be the original password. Click Next, then you will be prompted to thank you, and then confirm to roll back to win7.

2) It can only be reinstalled for more than one month.

Second, the direct installation of win10 to modify win7.

Preparation tools: 1. Start the U disk boot disk.

2. Win7 system image package.

Specific steps: 1) Make a U boot disk.

2. Install the U Boot Disk Maker for U Disk.

3. Insert the USB flash drive, open the USB flash drive boot disk maker, and click "One-click to make a boot USB flash drive".

4. Pop-up window confirmation, and perform a one-click production and startup U disk operation.

2) Install Win7

1. Make a U boot USB flash drive boot disk, press the boot boot shortcut key to set the USB flash drive boot when restarting the computer, and select the run win8pe option after entering the U boot main menu interface.

2. PE system automatically pops up the PE installation tool, in the case that the hard disk partition has been completed, you can directly select the win7 system image in the PE installation tool and install it in the C disk, click OK, 3, and then remind the program to perform the restore operation, click OK, 4, carry out the program restoration process, wait for the release of the win7 system image, 5, restart the computer, and then carry out the program installation process, just wait.

6. After the installation is completed, set the regular parameters by yourself, and enter the win7 system desktop after the setting is completed, and the system will be installed.

Hello friends:

Judging from the above screen, there is a problem with the system image you installed, and such a phenomenon will occur after installation, so it is recommended that you change an image or a CD, and reinstall it.

Hope it helps you and I wish you happiness

The cause of this is usually due to system file corruption or errors. Here's how to fix it:

1. It is recommended to repeat the power on and power off three times, then you can enter the safe mode, select troubleshooting, advanced options, and enable the safe mode.

2. Then after entering the safe mode, insert the Windows installation disk, press the Win+R key combination, enter SFC ScanNow in the run box, and click OK to repair the system.

3. If the reboot still doesn't work after repair, directly boot with the Windows installation disk and install the operating system from scratch.

4. If the original version is the same after installation, there may be a problem with the hardware, try to replace the memory, hard disk and other hardware, find the problematic hardware, repair or replace it.

It means that there is a problem with the system you reinstalled, and you can try it with a different installation package.

1. Microsoft has changed the activation rules of the win10 system, and the key can be activated without using after reinstallation. Compared with previous operating systems such as Win7, the new rules make it easier to reinstall and activate.

The reason why you don't need a key to activate the reinstall is because Microsoft has stored the activation information in the cloud, and when you reinstall the system, it will be automatically verified in the cloud when you are connected to the Internet.

And when you reinstall Windows 10, although the installer will also ask for a key, you can choose to skip it. After the reinstallation is completed, the win10 system will be automatically activated, because it will automatically determine whether the computer has been installed and activated when verifying in the cloud.

2. For a long time, Microsoft's product activation has relied on the computer hardware hash, which is unique, and the algorithm is irreversible, and it is not bound to any Microsoft service, it is only related to the computer hardware itself. The win10 installer checks the system activation status and reports it to the activation server. The Windows Activation Server will generate a license certificate based on the hardware hash and the version of Win10 (Home, Pro or other version) activated to activate the system.

The reinstallation and activation also only need to verify the hardware hash and system version, and the user is not required to enter the activation key.