Epmap port connections

[Adnank5]

Dear All,

Two of the pc's in my network is making inbound epmap connections to
domain controller around 30 connections and sometimes 40 connections.
Pc's are updated and fully patched, since there is no additional
software on these 2 pcs that differentiates them from other pcs on the
network hence i am worried it will slowdown the network, i have
scanned the pcs and no virus/worm i could find in the pc, and i can't
even close port 135 as it is being used for offering remote assistance
so this port has to be open all the time,

TCP dbsrv:epmap pc-1.ms.local:4941 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4942 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4943 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4944 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4946 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4947 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4948 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4949 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4950 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4952 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4953 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4954 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4955 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4956 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4958 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4959 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4960 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4961 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4962 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4964 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4965 ESTABLISHED
TCP dbsrv:epmap pc-1.ms.local:4966 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4967 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4968 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4969 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4971 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4972 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4973 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4974 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4975 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4977 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4978 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4979 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4980 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4982 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4984 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4985 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4986 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4987 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4988 TIME_WAIT
TCP dbsrv:epmap pc-1.ms.local:4990 TIME_WAIT

can anyone suggest or shed light on it... that what I am missing doing
to resolve this issue

Thanking in advance