For some unknown reason OracleXETNSListener won't start which prevents SQL Developer from connecting to it.

C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\ADMIN\listener.ora and C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\ADMIN\tnsnames

both have correct hostname.

C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\log\sqlnet has the following error:

***********************************************************************
Fatal NI connect error 12641, connecting to:
(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))

VERSION INFORMATION:
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
Oracle Bequeath NT Protocol Adapter for 32-bit Windows: Version 10.2.0.1.0 - Production
Time: 09-MAY-2010 18:08:29
Tracing not turned on.
Tns error struct:
ns main err code: 12641
TNS-12641: Authentication service failed to initialize
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0

The only thing I can think of is that I may have changed my workgroup recently, but I don't know why that would matter. Any ideas would be greatly appreciated.