keep losing wireless internet access Results

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I have a very frustrating problem that i can't seem to find a solution to...

I have an ADSL modem connected to a Cisco E-1000 wifi router. I have two laptops (Windows Vista and 7), an iPad and two smart phones. The iPad and the phones connect without any problems at all and stay connected without interuption. But the two laptops keep losing internet access! They stay connected 10-15 minutes, then invariably lose internet access. I have to manually disconnect and reconnect again to get back on the net - but again, only for 10-15 minutes.

If anyone has a suggestion, I would greatly appreciate it. I've tried many things - changing the channel, playing with all sorts of parameters (as suggested by the online chat guy) - but to no avail.

Thanks in advance for any help,

I've been having this problem for about a week now. There are two
computers on the LAN at home that are experiencing this.

Periodically, sometimes every 5-10 minutes, sometimes every 45
minutes, or hour or two, a WinXP machine seems to "lose" it's network

I typically see two variations on this:

1) The machine will simply have no network abaility at all. ipconfig
reveals an IP in the range. When this happens nothing
network related will work, I cannot even access my local Perforce
server (which is running on the same computer.)

2) ipconfig will reveal an IP in the range.
Previously, the machine would have been in the range
having received it's IP through the routers DHCP mechanism. I
understand the range is part of the automatic private
IP addressing feature. I don't understand why all of a sudden winXP
"loses" it's perfectly normal ip address and switches to this.

Sometimes when I notice the network connection has died, and ipconfig
still reports my 192.168.x.x IP address, I can then run ipconfig
/release to release my IP, but when I run ipconfig /renew, I get this
message "An error occured while renewing interface Network Bridge
(Network Bridge) : No connection could be nade because the target
machine actively refused it.

Now for the details:

-When it happens, sometimes unplugging the router and plugging it back
in will cause the computer to behave properly again, and it's 192....
IP address is restored.
-I first noticed this when using the D-Link DI-514 wireless router
with both computers connected to it via the wired ports (wireless was
for a tivo)
-I have since returned the D-Link router for unrelated reasons, and
have setup a Netgear RP614v2 wired router (no wireless). I have the
same problems with
this router. Thet netgear routers firmware is 5.13 (which is old, but
I'm waiting to see if this is a windows problem before getting into
firmware upgrades)
-My main computer that is having these problems is using a year old
WinXP Pro install with SP1, and all but 1 security update (the latest,
haven't bothered
until I get this sorted out)
-I have recently done a fresh install on a new 160GB drive (using
removable drive bays), and have similar problems on the fresh install.
-The other computer at home is also a fresh install of WinXP pro on a
new 160GB drive.
-Both new installs have all of the latest critical updates, but do not
have all of the WinXP fluff updates (Media player 9, etc...)

In the Network Connections folder, I see the following: (entries are
in the format -Name - Status - Device Name)

==LAN or High-SPeed Internet==
-1394 COnnection 2 - Enabled - 1394 Net Adapter #2

==Network Bridge==
-1394 COnnection - Enabled, Bridged - 1394 Net Adapter
-Network Bridge( Network Bridge ) - Enabled - MAC Bridge Miniport
-Local Area Connection - Enabled, Bridged - Intel(R) Pro/1000 CT
Nework Cnnection

Both systems are running ZoneAlarm. I disabled ZA's "launch on
startup" feature on one machine, shutdown, restarted, and still had
the same problem.
Zonealarm has as a trusted zone.

Both systems are setup to use automatic IP assignment via DHCP. The
router is configured to perform DHCP.

I have also run the Network Diagnostics from Help & Support, and
everything reports as "passed" when my machine is connected. Once I
lose my connection, the diagnostic reports FAILED for a network
adapter identified as [00000011] MAC Bridge Miniport and lists FAILED
for the DNSServerSearchOrder inside it.

Does anyone have any suggestions or advice?

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