If you receive the subject message, or a similar message, you may also receive:
System Process - Low on Registry Quota: Your system is running low on registry quota. Start the System option in the Control Panel and choose the Virtual Memory button to increase the registry quota.
Continued logon attempts may cause the following events to be recorded in the Application event log:
Event ID 1000 userenv RegLoadKey failed with error 1009 for C:\WINNT\Profiles\username\ntuser.dat Event ID 1000 userenv The operating system was unable to load the locally stored profile. A new local profile will be created. (1009)To resolve the original cause of this problem, increase the RSL ( Registry Size Limit):
1. Control Panel / System / Advanced / Performance Options / Change.
2. Increase the Maximum Registry Size.
NOTE: The maximum size of the paged pool in NT 4.0 192MB. The RSL can use 80% of the paged pool, 153.6MB. In Windows 2000, the RSL should not exceed 102MB.
3. After fixing the RSL, restart you computer and recover your lost local profile.