Keep getting error, it's making me mad.

Could not start compilationWin32Exception: ApplicationName=‘“C:\Program Files\Unity\Editor\Data\Mono\bin\mono.exe”’, CommandLine=‘“C:\Program Files\Unity\Editor\Data\Mono\lib\mono\unity\smcs.exe” @Temp/UnityTempFile-87c8eb86c7cd89749bb91a30d5bfe330’, CurrentDirectory=‘C:/Users/Xelius/Documents/Ui/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:/buildslave/unity/build/Editor/Mono/Utils/Program.cs:33)
UnityEditor.Scripting.Compilers.MonoScriptCompilerBase.StartCompiler (BuildTarget target, System.String compiler, System.Collections.Generic.List1 arguments, Boolean setMonoEnvironmentVariables) (at C:/buildslave/unity/build/Editor/Mono/Scripting/Compilers/MonoScriptCompilerBase.cs:31) UnityEditor.Scripting.Compilers.MonoScriptCompilerBase.StartCompiler (BuildTarget target, System.String compiler, System.Collections.Generic.List1 arguments) (at C:/buildslave/unity/build/Editor/Mono/Scripting/Compilers/MonoScriptCompilerBase.cs:18)
UnityEditor.Scripting.Compilers.MonoCSharpCompiler.StartCompiler () (at C:/buildslave/unity/build/Editor/Mono/Scripting/Compilers/MonoCSharpCompiler.cs:43)
UnityEditor.Scripting.Compilers.ScriptCompilerBase.BeginCompiling () (at C:/buildslave/unity/build/Editor/Mono/Scripting/Compilers/ScriptCompilerBase.cs:47)

Compilation failed because the compiler couldn’t be executed!

What do I do? I have searched for a while and found NOTHING. I really don’t like this. Thanks for responding!

Searched for a while and found nothing? Hmm, that’s weird. This is the result of 20 second search:

http://answers.unity3d.com/questions/736282/compilation-failed-because-the-compiler-couldnt-be-2.html?sort=oldest

The common problem is that the project folder isn’t there or cannot be accessed. First check if the folder exists with all the files still there. Then check if your antivirus has done something to the folder.