In cmd:
find /C "yourItemsName" %appdata%\microsoft\windows\recent\automaticdestinations\*
or in windows explorer, just delete those file size more than 1MB:
%APPDATA%\Microsoft\Windows\Recent\AutomaticDestinations
source:
www.howtogeek.com/howto/5245/fix-for-when-pinned-jump-list-items-get-stuck-in-windows-7/