After an automatic upgrade from 1.282 to 1.283 builds started failing with:

FATAL: C:\Program Files (x86)\Hudson\data\war\WEB-INF\lib\winp.dll: Can't load
IA 32-bit .dll on a AMD 64-bit platform
java.lang.UnsatisfiedLinkError: C:\Program Files (x86)\Hudson\data\war\WEB-INF
\lib\winp.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1751)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1647)
at java.lang.Runtime.load0(Runtime.java:770)
at java.lang.System.load(System.java:1005)
at org.jvnet.winp.Native.loadDll(Native.java:124)
at org.jvnet.winp.Native.load(Native.java:81)
at org.jvnet.winp.Native.<clinit>(Native.java:49)
at org.jvnet.winp.WinProcess.enableDebugPrivilege(WinProcess.java:195)
at hudson.util.ProcessTreeKiller$Windows.<clinit>
(ProcessTreeKiller.java:207)
at hudson.util.ProcessTreeKiller.get(ProcessTreeKiller.java:132)
at hudson.Launcher$LocalLauncher.kill(Launcher.java:361)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:273)
at hudson.model.Run.run(Run.java:866)
at hudson.model.Build.run(Build.java:112)
at hudson.model.ResourceController.execute(ResourceController.java:93)
at hudson.model.Executor.run(Executor.java:119)

and after one more restart with:

FATAL: Could not initialize class hudson.util.ProcessTreeKiller$Windows
java.lang.NoClassDefFoundError: Could not initialize class
hudson.util.ProcessTreeKiller$Windows
at hudson.util.ProcessTreeKiller.get(ProcessTreeKiller.java:132)
at hudson.Launcher$LocalLauncher.kill(Launcher.java:361)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:273)
at hudson.model.Run.run(Run.java:866)
at hudson.model.Build.run(Build.java:112)
at hudson.model.ResourceController.execute(ResourceController.java:93)
at hudson.model.Executor.run(Executor.java:119)

Maybe a packaging error?

Cheers,
Filip