A guide to troubleshooting missing A-P-I-M-S win. CRT runtime L one dash one dash zero DLL. Ever seen this dreaded message? Don't worry. We'll walk you through how to fix it fast. Before we begin, be sure to subscribe to Ninja one's IT Video Hub for more tech content like this. What is A-P-I-M-S win? CRT runtime L one dash one dash zero DLL. This DLL Dynamic link library is a key Windows file. It acts like a translator, especially for apps written in c plus plus and is tied to Microsoft Visual c plus plus redistributable for Visual Studio 2015. When it's missing or corrupted, certain programs can't run. So what causes this error missing or corrupted file? It might be deleted affected by malware or damaged during a crash incompatible software. Some apps need specific versions of the visual c plus plus Redistributable interrupted installs. Failed installs or uninstalls may leave out critical files. Signs you might see here are the telltale signs you're dealing with This specific DLL issue. The API MS win CRT Runtime. L one dash one dash zero DLL is missing popup when you start your computer or launch a program. Specific applications fail to launch, especially after installing new software. In some cases you might even experience slow performance or system crashes. When this error occurs, it's time to fix it. Here are some solutions to try. Use Microsoft's official solution. Visit Microsoft site. Search for the Universal C Runtime. Update and install it. Check Windows updates, go to start search windows. Update Check Four and install updates. Manual replacement. Be cautious only. Download the DLL from reputable sources. Place it in this directory. Restart your app. Repair visual c plus plus redistributable. Go to control panel programs. Programs and features. Right click Microsoft Visual c plus plus 2015 redistributable. Click change then repair. Restart your system. Use third party tools optional. Some tools claim to fix DLL issues, but always research first. To avoid unsafe software by following these steps, your system should be back on track. For more information, check out our official blog post on how to troubleshoot missing API Ms. Win CRT runtime L one dash one dash zero DLL linked in the description below.