>I removed a Flash component from the server yesterday.
>
>Now, when I enter SQL Server 2008 R2 on Windows Server 2003, I get:
>
>"Unable to read the list of previously registered servers on this system. Re-register your servers in the "Registered Servers" window.
>
>I also have another error when trying to open a query window:
>
>"Value cannot be null. Parameter name: viewInfo (Microsoft.SqlServer.Management.SqlStudio.Explorer)"
>
>What can of relation can there be between Flash and SQL Server?

There is MS Connect item

https://connect.microsoft.com/SQLServer/feedback/details/573771/value-cannot-be-null

For the first problem, check if https://support.microsoft.com/en-us/kb/955648 may offer any help.