Windows xp Pro. I've tried 10.2, 10.1 all day and keep getting this error.
ORA-24324: service handle not initialized
ORA-24323: value not allowed
ORA-28547: connection to server failed, probable Oracle Net admin error

I've had oracle 10.1 on this machine and uninstalled it. I've never had any problem before today.

Any clues as to whats happening. This is driving me crazy and I need to have this working by Friday.