Lazarus-main.zip Here

: Running from a zip allows you to have multiple versions of Lazarus on the same machine without them interfering with each other.

: Do not extract it to C:\Program Files on Windows, as restricted permissions can break the build process. Use a path like C:\Lazarus\ or your home directory instead. Install Free Pascal Compiler (FPC) : Lazarus-main.zip

Since you downloaded the (the zip) rather than an installer, you must "make" the IDE. : Running from a zip allows you to