Very Slow PC after installing an Internet Switch

  RISC OS user 18:40 31 Jul 13

I have just installed a TP-Link Model TL-SF10005D 5 port 10/100Mbps Desktop Switch. It appeared to be working correctly after I linked the Router to it via Port one and port 5 on the switch, my Laptop is linked to the switch via port 1, port 4 in connected but not in use at present it will be used for another PC in another room. My Desktop PC; RiscPC and the Solar PV system monitor are all still connected to the Router as before. The Laptop appears to be a little slow to show for instance BBC News 24 and it appears to be buffering, and then continues as normal but the Desktop PC's mouse keeps freezing or is very slow. If I switch off the Switch the PC works as normal. Is there a problem with the Switch or the way I have connected it to the Router. As it is it will be of no use as my wife will end up not being able to use the Desktop PC at the same time as I use the Laptop. Help please.

  RISC OS user 22:00 31 Jul 13

I have also noticed that the ping speeds have increase

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