xlxtrfun.xll is a XlXtrFun
belonging to XlXtrFun
from Advanced Systems Design and Development
Non-system processes like xlxtrfun.xll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues.