cryptui.dll information

What is a DLL?

DLL stands for Dynamic Link Library and is a file containing computer code and resources used by multiple programs at the same time. DLL files allow program developers to use the same code with several programs and make changes to these programs without having to write new code for each one.

There are many programs that rely on DLL files to function so when there is a damaged or missing DLL file you will experience poor system performance or system crashes.

What is cryptui.dll?

Cryptui.dll gives you the ability to add digital signatures to a file and certify the signature. Digital signatures give you proof that the files have not been changed since they were signed by the creator. Because of digital signatures and the certificates that validate them it is easier to find authentic versions rather than infected clones of the files you are searching for.

Cryptui.dll includes a CTL (Certificate Trust List) which is a list of certificates proven valid by an administrator. The CTL allows your system to tell the difference between a valid certified file and a copy that has been changed in some way since it was signed.

Cryptui.dll is a part of the CSP (Cryptographic Service Provider) software. CSP is a software that performs encoding and decoding of files. The CSP does this by creating a set of keys one public and one private that can be used for strong file verification.


Suggested Fix if You Are Receiving a DLL Error

When you have a damaged or missing DLL file it will cause error messages and even system crashes. To fix these problems the damaged or missing DLL file needs to be replaced with a working version. If the user can not find a valid replacement file the user may perform a clean installation of their operating system.

cryptui.dll is Created By:

Microsoft Corporation

Known File Path:



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