@LexiaFira I’m tagging you since Scribblemaniac answered part of your question recently. This is a common problem with “vanilla” or so called new Windows installations or installations without proper updates.
As mentioned it’s not recommended to download separate DLL files, as third party sites might have malware. Pencil2D comes bundled with an installer that takes care of the missing MSVCP140.dll issue, but you can also get this directly from microsoft https://support.microsoft.com/en-gb/help/2977003/the-latest-supported-visual-c-downloads
For the particular message on your screen you also need the universal C runtime for Windows 7 which you can find on our quick troubleshooting section on the software download website https://www.pencil2d.org/download/#troubleshooting