Go to windows update> installed > updates, check for these updates & uninstall them:
KB2592687, KB2574819 and KB2992611
!to find the dinhvd offending patches
wmic qfe list full | find /i "KB2592687"
wmic qfe list full | find /i "KB2574819"
wmic qfe list full | find /i "KB2992611"
!to remove the findhvd offending patches
wusa /uninstall /kb:2592687
wusa /uninstall /kb:2574819
wusa /uninstall /kb:2992611
After uninstalling these patches, reboot the machine and performance should be good.