Whenever i am ready to start a script, and i create a java script, unity pops up with an error saying something about a missing file and then deletes the script i just created.

UnauthorizedAccessException: Access to the path "C:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\ijok\Assets\NewBehaviourScript.js" is denied. System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) (at /Users/builduser/buildslave/monoAndRuntimeClassLibs/build/mcs/class/corlib/System.IO/FileStream.cs:320) System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share) (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare) System.IO.StreamWriter..ctor (System.String path, Boolean append, System.Text.Encoding encoding, Int32 bufferSize) (at /Users/builduser/buildslave/monoAndRuntimeClassLibs/build/mcs/class/corlib/System.IO/StreamWriter.cs:124) System.IO.StreamWriter..ctor (System.String path, Boolean append, System.Text.Encoding encoding) (wrapper remoting-invoke-with-check) System.IO.StreamWriter:.ctor (string,bool,System.Text.Encoding) UnityEditor.ProjectWindowUtil.CreateScriptAssetFromTemplate (System.String pathName, System.String resourceFile) (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ProjectWindow/ProjectWindowUtil.cs:203) UnityEditor.ProjectWindowCallback.DoCreateScriptAsset.Action (Int32 instanceId, System.String pathName, System.String resourceFile) (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ProjectWindow/ProjectWindowUtil.cs:65) UnityEditor.ProjectWindowUtil.EndNameEditAction (UnityEditor.ProjectWindowCallback.EndNameEditAction action, Int32 instanceId, System.String pathName, System.String resourceFile) (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ProjectWindow/ProjectWindowUtil.cs:111) UnityEditor.CreateAssetUtility.EndNewAssetCreation (System.String name) (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/GUI/CreateAssetUtility.cs:92) UnityEditor.ObjectListArea.RenameEnded () (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ObjectListArea.cs:751) UnityEditor.ObjectListArea.HandleRenameOverlay () (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ObjectListArea.cs:787) UnityEditor.ObjectListArea+LocalGroup.DrawItem (Rect position, UnityEditor.FilterResult filterItem, UnityEditor.BuiltinResource builtinResource, Boolean isFolderBrowsing) (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ObjectListLocalGroup.cs:836) UnityEditor.ObjectListArea+LocalGroup.DrawInternal (Int32 beginIndex, Int32 endIndex, Single yOffset) (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ObjectListLocalGroup.cs:177) UnityEditor.ObjectListArea+Group.Draw (Single yOffset, Vector2 scrollPos) (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ObjectListGroup.cs:145) UnityEditor.ObjectListArea.HandleListArea () (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ObjectListArea.cs:1377) UnityEditor.ObjectListArea.OnGUI (Rect position, Int32 keyboardControlID) (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ObjectListArea.cs:566) UnityEditor.ProjectBrowser.OnGUI () (at C:/BuildAgent/work/d3d49558e4d408f4/Editor/Mono/ProjectBrowser.cs:1737) System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/monoAndRuntimeClassLibs/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)