Comcast Slow On One Laptop Only

[dlai]

I'm hoping someone can help me with some speed issues I'm having. I have two laptops using XP connecting to a 6mb Comcast connection via wireless G. I've loaded cablenut and TCP optimizer on both and have the settings equal on both computers. However, one is able to connect at 7mb and the other only at 387 kbps. Upload is slow too. I can't figure out for the life of me why this one laptop is so slow. Hopefully someone can help out with some suggestions.

Here's some data:

TCP properties for IP = (xxxxxx)
Browser/OS = Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7
Notes: Read the Analyzer FAQ if the above is not your IP address.
TCP options string = 020405b40103030201010402
MTU = 1500
MTU is fully optimized for broadband.
MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.
Default TCP Receive Window (RWIN) = 256960
RWIN Scaling (RFC1323) = 2 bits (scale factor of 4)
Unscaled TCP Receive Window = 64240

RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
128480 (MSS x 44 * scale factor of 2)
64240 (MSS x 44)
bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 10278.4 kbps (1284.8 KBytes/s) @ 200ms
Your TCP Window limits you to: 4111.36 kbps (513.92 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = OFF
Time to live left = 51 hops

TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00100000 (32)

Precedence (priority) = 001 (priority)
Delay = 0 (normal delay)
Throughput = 0 (normal throughput)
Reliability = 0 (normal reliability)
Cost = 0 (normal cost)
Check bit = 0 (correct, 8th checking bit must be zero)

DiffServ (RFC 2474) = CS1 001000 (8) - class 1 (RFC 2474). Similar forwarding behavior to the ToS Precedence field.

More stuff:

:::.. Download Stats ..:::
Connection is:: 387 Kbps about 0.4 Mbps (tested with 748 kB)
Download Speed is:: 47 kB/s
Tested From:: http://testmy.net (server2)
Test Time:: Tue Feb 07 2006 16:38:27 GMT-0800 (Pacific Standard Time)
Bottom Line:: 7X faster than 56K 1MB download in 21.79 sec
Diagnosis: May need help : running at only 8.13 % of your hosts average (comcast.net)
Validation Link:: http://testmy.net/stats/id-TWRMQE7CP

[mccoffee]

Try thease in the sg optmizer below me to download and install

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU - 1500
TTL - 64
TCP Receive Window - 64240
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Windows Scaling - uncheck
Timestamps - uncheck
Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 20
LocalPriority - 5
Host Priority - 6
DNSPriority - 7
NetbtPriority - 8
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 240
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

VERY IMPORTANT TO DO THE FOLLOWING:
1. Under your LAN connection - properties - general tab, uninstall all the protocols there that you do not need. For a stand alone pc all you need is Internet Protocol TCP/IP.
2. Open IE and select tools - internet options - connections - LAN settings, make sure NOTHING there is checked.
3. ALWAYS connect your modem via ethernet (NIC) and make sure you have the latest drivers for your NIC from the manufacturer and set your duplex mode to "auto". If you are using a router make sure you have the latest firmware.
4. Clean out your temporary internet files with CrapCleaner (http://www.ccleaner.com).
5. Power cycle your modem i.e. unplug it for at least 15 seconds.
6. Download, update and scan with SpyBot S&D 1.4 (http://majorgeeks.com/download2471.html) EXACTLY as mnosteele has explained HERE (http://broadbandnuts.com/drtweak/index.php?board=4;action=display;threadid=41) & Ad-Aware SE 1.06 (http://lavasoft.element5.com/support/download) EXACTLY as mnosteele has explained HERE (http://broadbandnuts.com/drtweak/index.php?board=4;action=display;threadid=40) to remove any spyware then install and update SpywareBlaster 3.4 (http://www.javacoolsoftware.com/spywareblaster.html) to stay spyware FREE. YOU MUST USE BOTH AD AWARE & SPYBOT TO ENSURE YOU ARE SPYWARE FREE SINCE ONE FINDS WHAT THE OTHER MISSES. If these 2 programs find a lot of things then please post a HijackThis 1.99.1 (http://www.majorgeeks.com/download3155.html) log for us to look at.
7. Make sure you do the faster web page tweak in our Help & Tips (http://broadbandnuts.com/index.php?page=tiptrix) page.
8. If you have Zone Alarm as a firewall uninstall it and search your pc for the left over files.
9. Install Kerio Personal Firewall 2.1.5 (http://www.321download.com/LastFreeware/page7.html#Kerio%20Personal%20Firewall), it's FREE and uses next to no resources.
10. Do a FREE online virus scan from Kaspersky Webscan (http://www.kaspersky.com/beta), make sure to check the option to use the EXTENDED DATABASE.
11. Make sure you have ALL of the latest Windows Updates.

8) ;D

[dlai]

Did the changes, and it's a tiny bit faster, but still way off from where it should be:

:::.. Download Stats ..:::
Connection is:: 448 Kbps about 0.4 Mbps (tested with 2992 kB)
Download Speed is:: 55 kB/s
Tested From:: http://testmy.net (server2)
Test Time:: Tue Feb 07 2006 20:23:56 GMT-0800 (Pacific Standard Time)
Bottom Line:: 8X faster than 56K 1MB download in 18.62 sec
Diagnosis: May need help : running at only 9.41 % of your hosts average (comcast.net)

[mccoffee]

try 128480 with windows scailing checked.