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Modify the registry setting for TcpWindowSize by double clicking on the key.

Change the Base Setting to Decimal.

Enter the value 64240 and click OK, then exit RegEdit.


When I enered the value above it said it had to be truncated and I do not understand that. What does that mean, please?




Below is about my OS,


Operating System System Model

Windows XP Home Edition Service Pack 3 (build 2600) Dell Inc. Dimension 4700

System Service Tag: D8NCH71 (support for this PC)

Chassis Serial Number: D8NCH71

Enclosure Type: Mini-Tower

Processor a Main Circuit Board b

3.20 gigahertz Intel Pentium 4

16 kilobyte primary memory cache

1024 kilobyte secondary memory cache Board: Dell Inc. 0M3918

Serial Number: ..CN7082153B0188.

Bus Clock: 800 megahertz

BIOS: Dell Inc. A10 01/04/2006

Drives Memory Modules c,d

160.03 Gigabytes Usable Hard Drive Capacity

140.91 Gigabytes Hard Drive Free Space



3.5" format removeable media [Floppy drive]


ST3160811AS [Hard drive] (160.04 GB) -- drive 0 1528 Megabytes Installed Memory


Slot 'CHANNEL A DIMM 0' has 256 MB (serial number 162A0344)

Slot 'CHANNEL B DIMM 0' has 1024 MB (serial number 162A0344)

Slot 'CHANNEL A DIMM 1' has 256 MB (serial number 04004124)

Slot 'CHANNEL B DIMM 1' is Empty

Local Drive Volumes


c: (NTFS on drive 0) 160.03 GB 140.91 GB free


Network Drives

None detected



Marks a disabled account; Marks a locked account HP Officejet J3600 series on LPT1:

HP Officejet J3600 series on USB001

HP Officejet J3600 series fax on USB001


Controllers Display

Standard floppy disk controller

Intel® 82801FB Ultra ATA Storage Controllers - 2651

Intel® 82801FB/FBM Ultra ATA Storage Controllers - 266F

Primary IDE Channel [Controller] (2x) Intel® 82915G/GV/910GL Express Chipset Family [Display adapter] (2x)

DELL E153FP [Monitor] (14.9"vis, s/n Y441353J03TY, March 2005)

Bus Adapters Multimedia

Intel® 82801FB/FBM USB Universal Host Controller - 2658

Intel® 82801FB/FBM USB Universal Host Controller - 2659

Intel® 82801FB/FBM USB Universal Host Controller - 265A

Intel® 82801FB/FBM USB Universal Host Controller - 265B

Intel® 82801FB/FBM USB2 Enhanced Host Controller - 265C SoundMAX Integrated Digital Audio

Communications Other Devices


Intel® PRO/100 VE Network Connection

Physical Address: 00:13:20:32:01:44

Realtek RTL8169/8110 Family Gigabit Ethernet NIC

primary Auto IP Address: / 24


Dhcp Server:

Physical Address: 00:0E:2E:6B:1B:C7


Networking Dns Server:

HID-compliant consumer control device

HID-compliant device

USB Human Interface Device (3x)

HID Keyboard Device

HID-compliant mouse

Generic USB Hub

USB Composite Device

USB Root Hub (5x)

Virus Protection [back to Top]

avast! antivirus 4.8.1335 [VPS 090221-0] Version 4.8.1335

Realtime File Scanning On

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Thank you, Bear. I had tried it twice, but will try again later today as I have to run.



Here is a wikipedia answer http://en.wikipedia.org/wiki/Truncation


Not sure why you got that though


Are you sure your at the correct location ?




and you followed the instructions carefully ?




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Sorry, Bear, for taking so long to get back. Care-taking is a hard job. :)


Anyway, After I changed the base setting to decimal, Entered the value 64240, clicked okay, exited RegEdit, and rebooted, I went back to check it and it reads in the large white pane:


Reg- DWORD 0X000fafo (64240) I cliciked on it and it has changed back to hexadecimal with 64 in Value Data. Is this the way it should be?

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Thank you, Bear. I am not familiar with "sizes" so will have to explore when I have more time. Have to scoot now. Thanks again.



You can also change the size using a free and simple to use app called Dr. TCP


You can download it here!



Just set the size you want, click on save, exit the app, and reboot your PC!


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