Technical questions
What are the PC requirements for installing ModemSpeedBooster?

Why do I get the message "Registration Code Does Not Exist" when I enter my Registration code?

How do I uninstall ModemSpeedBooster?


I’m seeing an error message and the program will not start.

The Program worked initially, but no longer works. An error message may or may not appear when it is started.

What does ModemSpeedBooster optimize to improve my internet connection performance?


How does ModemSpeedBooster’s Memory Optimizer work?


TECHNICAL QUESTIONS

What are the PC requirements for installing ModemSpeedBooster?
Installation Requirements:

• Windows 95, 98, Me, NT4, or 2000.
• Pentium 66 or higher
• 32MB RAM recommended.
• Internet Connection: 14.4, 28.8, 56K, ISDN, xDSL, Cable, AOL, Satellite, WebTV, T1, T3, OCx

For free Internet Explorer updates please visit:
http://www.microsoft.com/windows/ie/default.asp

Why do I get the message "Registration Code Does Not Exist" when I enter my Registration code?

This can happen if you are entering an invalid code. It can also happen if you mis-type the code (many users confuse the 1 and i when typing). The best solution is to cut and paste the code field by field into the registration text field so as to avoid typing errors.

How do I uninstall?

Uninstallation can be performed from 2 locations. In the Start menu, under Programs, find the program's start menu entry, then click the "Uninstall" icon. Also, you may uninstall by opening the Windows Control Panel and choosing "Add/Remove Programs." In the Add/Remove programs list, select the name of the program and choose "Remove." If the program is running at the time you attempt to remove it, you will be required to reboot your PC to complete the uninstallation.

I’m seeing an error message and the program will not start.

ModemSpeedBooster installer does an excellent job of installing the necessary run time files, however, it is also dependent upon parts of Windows as well as files included in Internet Explorer. If you cannot start the program, update your browser and your Windows operating system to include the latest Service Pack. This can be done for free at
http://www.windowsupdate.microsoft.com

By updating your browser and operating system, you can make sure that 1-you have the latest technology, and 2-any files that have been corrupted, deleted, unregistered, or moved will likely be replaced.

The Program worked initially, but no longer works. An error message may or may not appear when it is started.

It is likely that an unrelated program that used shared files that the privacy suite also uses was uninstalled, and that this program removed the shared files when it was uninstalled. To fix this type of problem, first try reinstalling. If this does not succeed, Uninstall (see How do I uninstall) then re-download the software and reinstall again.

What does ModemSpeedBooster optimize to improve my internet connection performance?

The following is a partial list of Windows Registry settings that ModemSpeedBooster optimizes and their definitions:
MTU: (Maximum Transmission Unit) Is the greatest amount of data that can be transferred in one physical frame on the network. If a packet that has a smaller MTU than the packet's frame length is sent, fragmentation will occur. For Ethernet, 1500 is the maximum MTU. The unofficial MTU for SLIP servers is 1006.
MSS: (Maximum Segment Size) Defines the largest segment of TCP data that the Winsock is prepared to receive. When a connection is established, the two ends agree to use the smaller of each end's value. Windows calculates MSS automatically, based on MaxMTU.

DefaultRcvWindow:
(TCP Receive Window, or simply RWIN) Determines how much data the receiving computer is prepared to get. A too large RWIN will result in greater loss of data if a packet is lost or damaged. A too small RWIN will be very slow, as each packet will have to be acknowledged before the next packet is sent. The RWIN is set to a multiple of the TCP MSS.

Tcp1323Opts:
Large window support. Used when an application requests a Winsock socket to use buffer sizes greater than 64K. In previous implementations the TCP window size was limited to 64K, this limit is raised to 2**30 through the use of TCP large window support as implemented in Winsock 2.
SackOpts:Selective acknowledgements allow TCP to recover from IP packet loss without resending packets that were already received by the receiver. Employed with TCP large windows.
MaxDupAcks: Fast Retransmission and Fast Recovery of TCP connections that are encountering IP packet loss in the network. Allow a TCP sender to quickly infer a single packet loss by reception of duplicate acknowledgements for a previously sent and acknowledged TCP/IP packet. This mechanism is useful when the network is intermittently congested. The reception of 3 successive duplicate acknowledgements indicates to the TCP sender that it can resend the last unacknowledged TCP/IP packet (fast retransmit) and not go into TCP slow start due to a single packet loss (fast recovery).

DefaultTTL: Specifies the default Time To Live value set in the header of outgoing IP packets. The TTL determines the maximum amount of time an IP packet can live in the network without reaching its destination. It is effectively a limit on the number of routers an IP packet may pass through before being discarded.

PMTUDiscovery: Determines whether TCP uses a fixed, default maximum transmission unit (MTU) or attempts to find the actual MTU. The value of this entry is 0, therefore TCP uses an MTU of 576 bytes for all connections to computers outside of the local subnet.

PMTUBlackHoleDetect: When enabled, causes TCP to try to detect "Black Hole" routers while doing Path MTU Discovery. Enabling black hole detection increases the maximum number of retransmissions performed for a given segment.

How does ModemSpeedBooster’s Memory Optimizer work?

ModemSpeedBooster’s Memory Optimizer proactively monitors your system's level of available RAM to provide the best possible environment for your PC to run in. Using its advanced RAMFlow system, it tracks your free memory and automatically manages your RAM to prevent crashes and boost PC performance. If you are a novice user, you can just install the Memory Optimizer and enjoy fast automatic memory management and cache tuning. If you are an advanced user, you can configure "Target" and "Trigger" levels of RAM to free up the desired amount of memory. Memory Optimizer also allows you to view all running applications, even hidden ones, and how much RAM they use. You can set the CPU priority for these.


 

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