Exception on startup

[DiamondWizard]

Hi,

I am having a exception whenever i start unity (Unity 2020.3.6f1 Personal) :

Exception: ‘C:\Program Files\Unity\Editor\Data\Tools\RoslynScripts\unity_csc.bat’ not found. Is your Unity installation corrupted?
UnityEditor.Scripting.Compilers.MicrosoftCSharpCompiler.ThrowCompilerNotFoundException (System.String path) (at :0)
UnityEditor.Scripting.Compilers.MicrosoftCSharpCompiler.BeginCompiling () (at :0)
UnityEditor.Scripting.ScriptCompilation.CompilationTask.QueuePendingAssemblies () (at :0)
UnityEditor.Scripting.ScriptCompilation.CompilationTask.Poll () (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.CompileScriptAssemblies (UnityEditor.Scripting.ScriptCompilation.ScriptAssembly[ ] scriptAssemblies, UnityEditor.Scripting.ScriptCompilation.ScriptAssemblySettings scriptAssemblySettings, System.String tempBuildDirectory, UnityEditor.Scripting.ScriptCompilation.CompilationTaskOptions compilationTaskOptions, UnityEditor.Scripting.ScriptCompilation.EditorCompilation+CompileScriptAssembliesOptions compileScriptAssembliesOptions) (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.CompileScriptsWithSettings (UnityEditor.Scripting.ScriptCompilation.ScriptAssemblySettings scriptAssemblySettings, System.String tempBuildDirectory, UnityEditor.Scripting.ScriptCompilation.TargetAssembly[ ]& notCompiledTargetAssemblies, System.String[ ]& notCompiledScripts, UnityEditor.Scripting.ScriptCompilation.CompilationTaskOptions compilationTaskOptions) (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.CompileScripts (UnityEditor.Scripting.ScriptCompilation.EditorScriptCompilationOptions editorScriptCompilationOptions, UnityEditor.BuildTargetGroup platformGroup, UnityEditor.BuildTarget platform, System.String[ ] extraScriptingDefines, UnityEditor.Scripting.ScriptCompilation.CompilationTaskOptions compilationTaskOptions) (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilationInterface+<>c__DisplayClass40_0.b__0 () (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilationInterface.EmitExceptionAsError[T] (System.Func`1[TResult] func, T returnValue) (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilationInterface:CompileScriptsNoStop(EditorScriptCompilationOptions, BuildTargetGroup, BuildTarget, String[ ])

and a exception when i add a script to a game object :

Exception: ‘C:\Program Files\Unity\Editor\Data\Tools\RoslynScripts\unity_csc.bat’ not found. Is your Unity installation corrupted?
UnityEditor.Scripting.Compilers.MicrosoftCSharpCompiler.ThrowCompilerNotFoundException (System.String path) (at :0)
UnityEditor.Scripting.Compilers.MicrosoftCSharpCompiler.BeginCompiling () (at :0)
UnityEditor.Scripting.ScriptCompilation.CompilationTask.QueuePendingAssemblies () (at :0)
UnityEditor.Scripting.ScriptCompilation.CompilationTask.Poll () (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.CompileScriptAssemblies (UnityEditor.Scripting.ScriptCompilation.ScriptAssembly[ ] scriptAssemblies, UnityEditor.Scripting.ScriptCompilation.ScriptAssemblySettings scriptAssemblySettings, System.String tempBuildDirectory, UnityEditor.Scripting.ScriptCompilation.CompilationTaskOptions compilationTaskOptions, UnityEditor.Scripting.ScriptCompilation.EditorCompilation+CompileScriptAssembliesOptions compileScriptAssembliesOptions) (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.CompileScriptsWithSettings (UnityEditor.Scripting.ScriptCompilation.ScriptAssemblySettings scriptAssemblySettings, System.String tempBuildDirectory, UnityEditor.Scripting.ScriptCompilation.TargetAssembly[ ]& notCompiledTargetAssemblies, System.String[ ]& notCompiledScripts, UnityEditor.Scripting.ScriptCompilation.CompilationTaskOptions compilationTaskOptions) (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.CompileScripts (UnityEditor.Scripting.ScriptCompilation.EditorScriptCompilationOptions editorScriptCompilationOptions, UnityEditor.BuildTargetGroup platformGroup, UnityEditor.BuildTarget platform, System.String[ ] extraScriptingDefines, UnityEditor.Scripting.ScriptCompilation.CompilationTaskOptions compilationTaskOptions) (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.TickCompilationPipeline (UnityEditor.Scripting.ScriptCompilation.EditorScriptCompilationOptions options, UnityEditor.BuildTargetGroup platformGroup, UnityEditor.BuildTarget platform, System.String[ ] extraScriptingDefines) (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilationInterface.TickCompilationPipeline (UnityEditor.Scripting.ScriptCompilation.EditorScriptCompilationOptions options, UnityEditor.BuildTargetGroup platformGroup, UnityEditor.BuildTarget platform, System.String[ ] extraScriptingDefines) (at :0)
UnityEditor.Scripting.ScriptCompilation.EditorCompilationInterface:TickCompilationPipeline(EditorScriptCompilationOptions, BuildTargetGroup, BuildTarget, String[ ])

I havent been able to add a script to any game object.
Some of my questions :
Is this a C# exception?
How can i fix it?
Why is this happening?

Images :
First image is the console on startup, Second image Assets folder, Third image errors that occur after adding the script to a game object,Fourth image is the script, Fifth image is the inspector :

Please help,
Thanks.

[Kurt-Dekker]

You neglected to say if you investigated if the unity installation might be corrupted, as the message suggests.

One way of investigating that is to uninstall and reinstall.

Or perhaps try another version.

Is it just this project? What about a brand new empty project?

etc etc

[DiamondWizard]

Its fixed now.
It turned out it was a problem in my windows installation (not being able to run .bat files or open the Command Prompt) so i refreshed Windows 10 and that fixed it now the exceptions are gone and i can open cmd and run .bat files. But thanks anyway, how do i mark this as Solved? Also how do i view my own posts?