What is DDE Server Window?
How to fix the unable to shut down Due to a DDE Server Window error?
This post offered byMiniToolgives answers.

Then, they are unable to shut down due to a DDE Server Window.
It allows programs on your system to communicate with each other.
Refer to this post How to Create and Use Shutdown Shortcut on Windows 10/11.
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There are some great ways to shut down Windows 10/11 in this post.
you could go toControl Panel > Programs and Featuresto uninstall them.
After fixing the issue, it’s possible for you to download them again to protect your Windows PC.

You had better disable it since it can affect your shutdown process.
Here is how to disable it.
Press theWindows + Rkeys together to openRun.

Go to the following path:
HKEY_LOCAL_MACHINE -> SYSTEM -> CurrentControlSet -> Control
4.
In the right panel, find theWaitToKillServiceTimeoutvalue.
Double-click it to change its value data to2000and clickOK.

Then, go to the following path:
HKEY_USERS.DEFAULT\Control Panel\Desktop
6.
Right-smack the blank area in the right panel.
Then, chooseNew > String Value.

TypeAutoEndTaskand double-click it to change its value to1.
At last, clickOK.
Thus, you might create a new user account.

Go toSettings>Accounts.
ChooseFamily & other people.
Click theAdd someone else to this PCoption.

Then select theI dont have this persons sign-in informationoption.
ChooseAdd a user without a Microsoft account.
Then enter the desired username and clickNext.
If there are, it’s possible for you to download and install them.
you’ve got the option to try them one by one until the issue has been fixed.
I hope this post can be helpful to you.