Missing api-ms-win-core-timezone-i1-1-0.dll

The name of the missing file is actually api-ms-win-core-timezone-l1-1-0.dll.

These are popular kinds of error messages when installing/launching third party programs,

I recreated the problem using Skype as an example:

That file is not included in any Windows installation, Service Pack or update.

The problem is that the developers have used some version of C++ to create their programs and the programs require some runtime files (Dynamic Linked Libraries) to be present in order to install/run and the developers do not include those files with their installation (why not?) and the websites for the programs often do not list the prerequisites and requirements of what you need to have installed for their programs to work.

They think that since the program installs and works fine on their system (because they have all the requirements) that the install will work fine on every other system in the world too.  Short sighted thinking.

These files are not part of or included in a regular Windows installation so no amount of Safe Mode, Clean Boot or sfc /scannow is going to help you or make the missing file magically appear (sorry Microsoft engaged Support Engineer alleged "experts").

What you need to do is install the Visual C++ Runtime files and I would start with the 2015 version which you can download from this link (choose the right architecture/bitness for your system):

https://www.microsoft.com/en-us/download/details.aspx?id=48145

You should also install this KB Update if it is not already installed (you can't install it twice):

https://support.microsoft.com/en-us/help/2999226/update-for-universal-c-runtime-in-windows

After the installation you shouldn't have to restart your system but do it anyway then see how your install/program launch works.

FYI:

Over time you may find that you may need several C++ runtimes installed as you can see here:

Having several versions of C++ Redistributable is normal... depending on what third party programs you might have installed.

What happened when you followed the advice and reinstalled the program?

What program you were attempting to open when you received this error message?

If you downloaded the installer for this program (e.g., Apple's iTunes), temporarily disable your antivirus program, get a fresh download, and reinstall the program.  Then turn your a/v back on.

Some people have reported fixing this issue by installing the Visual C++ Redistributable for Visual Studio 2015 (https://www.microsoft.com/en-us/download/details.aspx?id=48145), but that's just a guess and it may or may not work for you.

I was told by the company that the error message was not on their end and that reinstalling the program would not resolve the issue.  I was directed to research the issue to find a resolution.  

I am using Avast internet security for anti virus but also was "told" by Windows when I checked for security updates that I needed to install some type of interface.  That whole message seemed strange to me but because I was in the Windows update window did not think that it could be compromised.  

Avast has not found anything wrong with my PC either.

I did a system restore but still get the missing .dll message.

Hi, I had this same problem and I tried everything. It was very frustrating because I'm practically a dummy in all of this stuff. This is what I did just a few minutes ago and it worked for me. Hope it does for you too.

1. I disabled my anti-virus (I use Avast the free version)
2. Downloaded Microsoft Visual C ++ Redistributable 2012 (I already installed the 2015 version). Maybe your program requires another version of Visual C++
3. Repaired my Microsoft Visual C ++ Redistributable 2015
4. Deleted all setup files for the program that wouldn't open (for me it was iTunes), started a fresh download of it and reinstalled it.

I tried opening it, it worked. Then I turned my anti-virus back on, it's still working.

Hope this helps.

Had this error running an uninstall tool for AVG this solution fixed this error. Thanks!