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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(230.39999999999998, 72%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ENN%3C/text%3E%3C/svg%3E)
Hi @Nguyễn Ánh Dương，
You could try use Uninstaller to uninstall all SQL system, reboot your system and use some clean up app like ccleaner and try reinstalling.
Also check this thread.
Regards，
Zoe Hui
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I have reinstalled windows but it doesn't work
Hi @Nguyễn Ánh Dương，
In the folder C:\Program Files\Microsoft SQL Server\160\Setup Bootstrap\Log there is one folder per install attempt. The one of most interest is Summary.txt and Detail.txt. Feel free to attach it here.
You said you reinstalled Windows. Is this log from your first attempt after reinstalling Windows? We would also need to see the file details.txt.
I don't see the file detalils.txt anywhere
Each of the folders you have in the screenshot has log files from an installation attempt. There are quite a few of them, but details.txt is the one that usually has the important information.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(83.2, 62%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EZY%3C/text%3E%3C/svg%3E)
According to my experience with SQLserver, this is due to the fact that you have previously installed a SQL Express instance and have not uninstalled it cleanly, so you can use Bing Browser to find a way to uninstall it yourself and reinstall it.
Off topic: where did you download the express version from？
Bert
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I have reinstalled windows but it doesn't work
Global rules:
Warning IsFirewallEnabled The Windows Firewall is enabled. Make sure the appropriate ports are open to enable remote access.
If the error message is displayed, check the firewall