can't launch plutonium
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MSVCP140.dll is part of Microsofts Visual C++ Redistributable package. I believe you need both x86 and x64 versions (vc_redist.x86.exe && vc_redist.x64.exe) to be able to run the launcher and games.
As for the "failed to check for updates" error, I'm not 100% sure but try run the launcher as administrator and also make sure your firewall/antivirus has the relevant permissions.
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Neosm it's all covered in this topic https://forum.plutonium.pw/topic/6832/common-launcher-issues-solutions