Error code.

 **How can i fix this ? Please help me.**

When i start my Unity it says this code and also this code:

Compilation failed because the compiler couldn't be executed! (that is all it says)

Could not start compilationWin32Exception: ApplicationName='"C:/Program Files (x86)/Unity/Editor/Data/Mono\bin\mono.exe"', CommandLine='"C:/Program Files (x86)/Unity/Editor/Data/Mono\lib/mono/unity\us.exe" @Temp/UnityTempFile-9133018f4fc4a354e8cbb714b1b2f5b9', CurrentDirectory='C:/Users/maurits/Documents/New Unity Project 1/Assets/..' System.Diagnostics.Process.Start_noshell (System.Diagnostics.ProcessStartInfo startInfo, System.Diagnostics.Process process) System.Diagnostics.Process.Start_common (System.Diagnostics.ProcessStartInfo startInfo, System.Diagnostics.Process process) System.Diagnostics.Process.Start () (wrapper remoting-invoke-with-check) System.Diagnostics.Process:Start () UnityEditor.Utils.Program.Start () (at C:/BuildAgent/work/d63dfc6385190b60/Editor/Mono/Utils/Program.cs:33) UnityEditor.Scripting.Compilers.MonoScriptCompilerBase.StartCompiler (BuildTarget target, System.String compiler, System.Collections.Generic.List`1 arguments, Boolean setMonoEnvironmentVariables) (at C:/BuildAgent/work/d63dfc6385190b60/Editor/Mono/Scripting/Compilers/MonoScriptCompilerBase.cs:32) UnityEditor.Scripting.Compilers.MonoScriptCompilerBase.StartCompiler (BuildTarget target, System.String compiler, System.Collections.Generic.List`1 arguments) (at C:/BuildAgent/work/d63dfc6385190b60/Editor/Mono/Scripting/Compilers/MonoScriptCompilerBase.cs:20) UnityEditor.Scripting.Compilers.UnityScriptCompiler.StartCompiler () (at C:/BuildAgent/work/d63dfc6385190b60/Editor/Mono/Scripting/Compilers/UnityScriptCompiler.cs:58) UnityEditor.Scripting.Compilers.ScriptCompilerBase.BeginCompiling () (at C:/BuildAgent/work/d63dfc6385190b60/Editor/Mono/Scripting`enter code here`