Minecraft Crashing

Hello, Recently my account was really acting laggy and it always kept crashing another day. I got onto my computer and its loading and loading and it crashes and I'm still on the launcher. I really don't know whats going on please help.  Heres a Screenshot

 

https://gyazo.com/a5f3802eeac126185a21e40facc8282f

 

 

Thanks,

Also my computer is really old i had it since 2015