Running Jenkins as a scheduled task on Windows 2008 server. Recently upgraded to Jenkins v2.100 and since then I have problems deleting builds. Getting 'build in use error'

Checking for open file handles on the Windows server confirms that Jenkins is keeping open file handles on the log folders

This is true for several jobs. Some common plugins in use

[conditional-buildstep@1.3.5]
[groovy@1.30]
[envinject@1.93.1]
[scriptler@2.9]
[ssh@2.5]