SQL Server has been working fine but since Friday I have not been able to connect to the database engine in SSMS. This coincided with my having to power the laptop off durin
I know it's probably too late to help with the original poster, but we had this same issue and nothing we tried resolved the problem. Finally, we opened a technical incident with Microsoft and this is the solution that we were provided:
HKLM\SOFTWARE\Microsoft\Cryptography\MachineGuid This key should ideally have the GUID of the machine without curly braces, so {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} becomes xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
The above solution worked on two separate machines exhibiting this problem.