A: Lunar Client dropped Windows 7 support in 2023. Stick with standalone OptiFine or Prism Launcher.
Download the "Visual C++ Redistributable for Visual Studio 2015" from the official Microsoft site. Install both the x86 and x64 versions. opticraft minecraft windows 7 fix
If you have followed this guide and still see crashes, your hardware is likely the issue. Integrated graphics from before 2014 (Intel HD 2000/3000) simply lack the instruction sets OptiFine uses. In that case, your is upgrading to Linux (Ubuntu MATE) or Windows 10 on the same machine. A: Lunar Client dropped Windows 7 support in 2023