Hi Lhiz,
Thank you for posting your query in Microsoft Community.
I’m sorry to know that you ‘api-ms-win-core-libraryloader-l1-2-0.dll’of Movie Maker is missing even after reinstalling Movie Maker. I will be happy to assist you.
Please follow the below methods and check if that helps.
Method 1: I suggest you to follow the steps to perform Safe mode in Last known good configuration from the article below:
Method 2: Startup Repair using Windows 7 DVD
If safe mode doesn’t help, please follow the steps below and perform startup repair.
Please check the link below for Startup Repair
http://windows.microsoft.com/en-us/windows7/products/features/startup-repair
Note: After restart, try to boot the computer normal mode and check if issue is resolved.
Please let us know, if you need any further help and we would be glad to assist you further.
Thank you.