A lot of IT Professionals are moving to Hyper-V and they need to keep updated with all Hyper-V hotfixes, updates and Service Packs. The Below links are for Hyper-V on both Windows 2012 and Windows 2008R2. Some of these updates/fixes are intended to fix specific problem, so don’t apply them unless you have this specific issue. 

1.       Windows 2008R2 Hyper-V


2.       Windows 2012 Hyper-V 

Thanks to the above wiki creators.