The communicates being thrown in the console at the top of every build are kind of:

ln 2014-09-17_14-23-26 T:\jenkins\jobs\Bootloader\builds\11 failed
hudson.util.jna.WinIOException: Failed to create a symlink T:\jenkins\jobs\Bootloader\builds\11 to 2014-09-17_14-23-26 error=1:Incorrect function
at hudson.util.jna.Kernel32Utils.createSymbolicLink(Kernel32Utils.java:93)
at hudson.Util.createSymlink(Util.java:1078)
at hudson.model.Run.updateSymlinks(Run.java:1792)
at hudson.model.Run.execute(Run.java:1704)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:232)
ln builds\lastSuccessfulBuild T:\jenkins\jobs\Bootloader\lastSuccessful failed
hudson.util.jna.WinIOException: Failed to create a symlink T:\jenkins\jobs\Bootloader\lastSuccessful to builds\lastSuccessfulBuild error=1:Incorrect function
at hudson.util.jna.Kernel32Utils.createSymbolicLink(Kernel32Utils.java:93)
at hudson.Util.createSymlink(Util.java:1078)
at hudson.model.Run.createSymlink(Run.java:1812)
at hudson.model.Run.updateSymlinks(Run.java:1793)
at hudson.model.Run.execute(Run.java:1704)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:232)
ln builds\lastStableBuild T:\jenkins\jobs\Bootloader\lastStable failed
hudson.util.jna.WinIOException: Failed to create a symlink T:\jenkins\jobs\Bootloader\lastStable to builds\lastStableBuild error=1:Incorrect function
at hudson.util.jna.Kernel32Utils.createSymbolicLink(Kernel32Utils.java:93)
at hudson.Util.createSymlink(Util.java:1078)
at hudson.model.Run.createSymlink(Run.java:1812)
at hudson.model.Run.updateSymlinks(Run.java:1794)
at hudson.model.Run.execute(Run.java:1704)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:232)
Building in workspace T:\jenkins\jobs\Bootloader\workspace
Reverting T:\jenkins\jobs\Bootloader\workspace\. to depth infinity with ignoreExternals: false

an then everything is getting normal and build is finished as success.