Microsoft (R) Visual C# Compiler version 2.9.1.65535 (9d34608e),Hello

Hello
I am getting an error of Microsoft (R) Visual C# Compiler version 2.9.1.65535 (9d34608e). I got this error when I tried to import Unity SDK 3.0.
I have read the documentation here but none seem help resolve the problem. Please help me,

Update:
error was occured bcause there was some lines present in registry which shouldn’t be there so follow the links i’ve posted below to solve this issue.

found solution for this

  1. Unity 2019.3.0a7: Microsoft Visual C# Compiler Errors - Stack Overflow
  2. windows 7 - Error in command line "The system cannot find the path specified." - Super User