DBV WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0 x80000002. Windows RegCreateKeyEx(...) returned error code 5.

Once a while I got this when start DBV:
WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0 x80000002. Windows RegCreateKeyEx(...) returned error code 5.


This post solvedthe problem
http://www-01.ibm.com/support/docview.wss?uid=swg21496098

Resolving the problem

The work around is to login as the administrator and create the key HKEY_LOCAL_MACHINE\Software\JavaSoft\Prefs. 

using regedit.