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Event ID: 1507 Source: Userenv

Source
Level
Description
This computer is in manual policy mode but the policy file cannot be found. Windows is logging you on without applying any policy. Return value (The system cannot find the file specified. ).
Comments
 
Check de reg value for this key:

HKLM\System\CurrentControlSet\Control\Update
UpdateMode REG_DWORD 0ff=0, Auto=1, manual=2

If the reg value is set to 2, you need another key or it will generate this event. The new key is:

HKLM\System\CurrentControlSet\Control\Update
NetworkPath REG_SZ

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