Windows Vistat/7 starting with a temporary profile

Rename the temp profile & then rename your 'actual' profile entry in the registry by removing the .bak

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

Oracle ORA-00600: internal error code, arguments: [keltnfy-ldmInit]

Error

Oracle ORA-00600: internal error code, arguments: [keltnfy-ldmInit], [46], [1], [], [], [], [], []

Solution:
Check if the hostname has not been changed, or the /etc/hosts file has the correct entry fir your host.