Unable to read a list of previously registered servers on this system. Please re-register your server in the Registered Servers window ...

Log in today SQL Server2008 R2 time has been error, such as:

Click Continue after the error such as:

At that time, I was confused, this situation, in the attempt to restart the server, change the environment variables, such as a series of operations without fruit, only online help, online check the reason is because the temporary processing path caused by abnormal.

Here's how to fix it:

C:\users\<username>\appdata\local\temp Delete the 2 folder, in the new 2 folder, if there is no 2 folder to create a new one, I have no folder, directly new 1, 22 files, Open the SQL server2008 again R2 will not error. Ps:<username> is your current computer login user name, not administrator user, may need to administrator permissions.

Unable to read a list of previously registered servers on this system. Please re-register your server in the Registered Servers window ...