Event ID - 1001

Event Id1001
SourceSQLCTR70
DescriptionThe description for Event ID ( 1001 ) in Source ( SQLCTR70 ) could not be found. It contains the following insertion string(s): Cannot open the Registry Key.
Event InformationThis may indicate problems with the SQL Server 7.0 Performance Monitor counters. 
WORKAROUND :
To work around this problem, you must remove and reinstall the SQL Server 7.0 Performance Monitor counters. To do this, perform the following steps: 

Open a command prompt. 
Run the following command to unload the SQL Server 7.0 Performance Monitor counters:

unlodctr mssqlserver

Close and re-open Performance Monitor; the SQL Server counters should now have been removed from the object list. 
Run the following command from the command prompt to load the SQL Server 7.0 Performance Monitor counters again:

lodctr c:\mssql7\binn\sqlctr.ini


Close and re-open Performance Monitor; the SQL Server 7.0 counters should now appear in the object list. 
If the SQL Server 7.0 counters still do not appear in the object list, close Performance Monitor and stop SQL Server 7.0. Then restart SQL Server 7.0 and open Performance Monitor again.
Reference Links PRB: "Event ID (1001) in Source (SQLCTR70) Could Not Be Found"

Perfmon Errors Logged in Event Log when SQL Server Not Running

Catch threats immediately

We work side-by-side with you to rapidly detect cyberthreats
and thwart attacks before they cause damage.

See what we caught

Did this information help you to resolve the problem?

Yes: My problem was resolved.
No: The information was not helpful / Partially helpful.