Windows 7 network Slows down Packets are Lost

Issue:

1-No router, directly plugged into the cable modem
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Two identical HP tablet 2730p tablet laptops one with Windows 7 and the other with Windows XP. The one with Windows 7 will begin to have intermittent connection after xx minutes. If I do a restart, I can ping sites with no packet loss and surf the web with no issues. But after 10-15 minutes, internet pages will error with page cannot be displayed and I will get 50-75% packet loss on pings. I have to keep refreshing to page over-over for it to pull in. If I disconnect the cable from the PC for xx minutes and reconnect all the speed comes back until xx-minutes and I am in the same boat.

If I do the same with the WInXP laptop no issues no packet loss. Surf the web does not present an issue at all

The Windows 7 network slow down happens on wireless as well but to eliminate devices I am doing this directly from my cable modem. No forget the wireless for now.

Wi-Fi is off on both units



2-Verizon AirCard
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Test by not using the PC's network devices

Job provides me a cellular card. Again when I insert the card in the WInXP machine no issues at all. When I place the card in the Win7 machine I get great connection at first with no packet loss, but after xx minutes I began to see packet loss on this card and surf the web with began showing page cannot be displayed


Need Help
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This is driving me crazy...what is it about Win7 and it's network. When do a ipconfig /all the ip address list some:

IPv4 address: 98.251.136.56(Preferred)

ipconfig /release all does not seem to break the IP lease that is set to expire on 12/24/09 and looks nothing like XP how it list the address. The IP is different from machine to machine meaning if I take the cable out the XP machine over to the Win7 identical machine.

I have unplugged the router on each machine reboot and keep getting this crazy issue. Help

Thx
parcouAsked:
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parcouConnect With a Mentor Author Commented:
ISP issue in area unknown to the business clients...they finally fixed after 4-days of pain
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Will SzymkowskiSenior Solution ArchitectCommented:
Have you tried uninstalling your NIC and getting the latest drivers for it and then reinstall? Have you checked in the event viewer to see if there are any errors populating that may point to a network issue?

Also, for performace testing have you tried to lower your MTU and then see if you are getting the same issues with packet loss. Also, have you tried a tracert to see what path your computer is taking? A possible routing issue with your ISP?
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John GriffithConsultantCommented:
Does the Windows 7 have an Internet Security package installed - NIS, N360, KIS, Mcafee, etc... with a personal firewall?
Also - try the Windows 7 system in SAFEMODE w/ Networking
Also - run IE8 on the WIndows 7 system at an elevated level and see if any different (RIGHT-click on IE8 icon, select "Run as Administrator"
Regards. . .
jcgriff2
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parcouAuthor Commented:
Spec01:

I did remove all the drivers and rebooted and still have this haunting issues... Not certain how to change the MTU in the comcast modem but there is an option for this if I add the router back...


jcgriff2:
All I run is Webroot Spysweeper Anti/Spy sweeper. I will try the safe mode now and report back

I saw somewhere someone stated to disable the iPv6 and a few other items....do you all agree with this???
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TrustWiseCommented:
This might be stating the obvious but have you scanned for virus's.
Malwarebytes:http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html

Combofix: http://www.bleepingcomputer.com/combofix/how-to-use-combofix

disable all virus protection and firewalls first. If you haven't use combofix you may want to read the website first. Post you logs here so someone can take a look at them.
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TrustWiseCommented:
You can disable IPv6, have you tried a static IP? Depending on the router you should be able to setup a static IP outside the DHCP range. Try .151 or higher.
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