network causes freeze

Hi:

I am having a problem with my home network, the two computers that I have are a HP Pavilion with a P2 350 MHZ processor, OS is WinXP home addition (5.1 Build 2600)SP2 with 320 MB of Ram.
The other is a IBM Aptiva with a AMD K6-2 300 MHZ processor, OS is WinME(4.90 Build 3000) with 128 MB of Ram.
Both are using a 3Com HomeConnect 10M PCI Phoneline Adaptor NIC.
I used the network wizard to set up the network, it works for a couple of minutes and then freezes my HP.
How can I remove the network setup from both systems and start again. When I try to repair it using the repair button it comes up saying that it can not repair the connections and to see the systems administrator.

Any solutions
Jim C.
collinj@mycybernet.net