compiler error

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-6a36f015a67019143b9f154618e8f7dc’, CurrentDirectory=‘C:/Users/Julian/Desktop/unity projects/unity projects/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)

This keeps on popping up when i try to press play.
How do i fix this?

Well Julian, it seems like a problem launching certain unity programs. You can try running Unity as an administrator. If that doesn’t work you may want to try reinstalling Unity, as some of the settings in Unity or your system may be off.