SQL server resolves error18456 and error2812

When I started sqlserver2000 login in SQL Server mode today, I suddenly reported error 18456. I tried a lot of methods on the Internet and finally solved the problem by using the following methods. I changed the sa Login Password, however, the error error2812 failed to find the Stored Procedure 'SP _ password' was reported during the modification. Finally, a method was found to run the code in the query analyzer (click to get the code) you can solve this problem. I tried it and it is completely easy to use! Share with you.

Note: The Code link is my Wordpress blog. I hope you can provide more support.