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The Internet Tuning tool analyzes your computer and provides a recommended list of items that will bring about Internet performance improvements. The process involves performing an analysis for areas that can benefit from an Internet performance tuning and then providing only the recommendations relevant to your system. You can also use the Advanced Settings to configure the Internet TuneUp items as described below.
 Internet TuneUp and the Smart TuneUp
You can also run an Internet Tuneup when performing a Smart TuneUp. In doing so you have the opportunity to run multiple functions at once and we recommend using it if you want to run tools consecutively including Registry Repair, System TuneUp, Internet TuneUp, and Registry Defrag. See the Smart TuneUp section for more.
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Advanced Settings
You can configure the Internet TuneUp items as listed in the table below (see Internet TuneUp Items), without scanning.
 If this is your first time using the Internet TuneUp tool, we recommend running a scan as instructed below. Once you have more familiarity with the TuneUp items and the functioning of the tool, you can use the Advanced Settings to quickly make changes.
To view the Advanced Settings, do the following:
From the Optimize page, click the corresponding Advanced Settings link.
All the Internet TuneUp items are listed and you can choose to "revert" items that are optimized or you can "optimize" items that are not yet optimized.
To optimize items, do the following:
Click the Optimize button.
To revert items to the original setting, do the following:
Click the Revert button.
When you are finished you can click the "Main Menu" button to return to the other program functions.
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Starting an Internet TuneUp
Getting started is simple.
To start the TuneUp process, do the following:
From the Optimize page, click the Internet TuneUp link.
Cancel a Scan
You can cancel a scan after it has started. Any performance items that are detected prior to cancelling the scan are displayed in the results.
To cancel a scan do the following:
Click the Cancel button.
Results: Internet TuneUp Opportunities
A list of Internet performance opportunities is generated for you to review and select from.
Internet TuneUp Items
The following table includes all the Internet TuneUp items and gives a description and a benefit gained from tuning the item.
Item:
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Information:
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Enhance Internet Performance
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Benefit: Discover and optimize the MTU (Maximum Transmission Unit) to eliminate fragmented network transmission.
Description: Each remote host is reached through a different path connected by multiple routers. An optimum MTU setting maximizes the throughput confined by physical constrains imposed by the routers on each path. We recommend turning this feature on to enhance the performance of your Internet.
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Detect black hole routers
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Benefit: Overcome remote networking issues caused by black hole routers.
Description: Enabling this function tells TCP/IP to try to automatically detect the MTU for all networks along the path to a remote host. Once TCP/IP knows the MTU for all networks along a path, it can avoid using MTU values that that are too high, thus avoiding packet fragmentation and the performance problems that come with it.
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Prevent network connection timeout
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Benefit: Reduce the likelihood of timing out when connecting to slow websites or network resource.
Description: When connecting to a slow website, Internet connections time out because TCP/IP's TTL (Time To Live) counter expires because it takes the packets too long to get to their destination. The TTL value is optimized to avoid packet timeout.
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Enable high performance networking
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Benefit: Allow TCP to use the timestamping and window scaling features to increase network performance.
Description: Window scaling lets TCP adjust the receive window size to up to 1GB. Timestamps help TCP measure performance accurately in order to adjust retransmission timeouts. Both features scale up network performance.
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Increase network transmission effectiveness
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Benefit: Improve network error handling by only retransmitting dropped packets in correct sequences.
Description: This feature allows a packet or series of packets can be dropped, and the receiver informs the sender which data has been received, and where there may be "holes" in the data. It also determines the number of duplicate ACKs that must be received for the same sequence number of sent data before "fast retransmit" is triggered to resend the segment that has been dropped in transit.
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Increase network bandwidth
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Benefit: Maximize the usage of available networking resource by reducing reserved bandwidth.
Description: By default, Windows reserve 20% of the network bandwidth for internal use. Releasing or reducing this reserve makes more bandwidth available to networking applications.
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Increase network throughput
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Benefit: Increase the number of network redirector buffers to increase network throughput.
Description: The network redirector sends data requests to and receives responses from a remote server. Allocating a higher number of computing resource to the network redirector will increase the throughput of your network.
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Increase DNS cache size
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Benefit: Reduce redundant DNS lookups by storing previously resolved DNS query results.
Description: When you connect to a web page, a process occurs where the URL address is resolved to a numerical Internet IP address. By increasing your DNS cache size and storing resolved DNS results, you reduce redundant lookups and improve the efficiency of this process.
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Optimize DNS cache performance
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Benefit: Improve DNS lookup performance by preventing failed DNS lookups from getting cached.
Description: When DNS caching is enabled Windows stores successful and unsuccessful lookup results. Continuous DNS lookup failure can result until the DNS cache expires (several minutes) or is cleared by rebooting. Enabling this feature prevents failed DNS queries from being stored in the DNS cache.”
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Increase Simultaneous Web Connections
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Benefit: Enhance Internet speed by increasing the number of simultaneous HTTP sessions allowed.
Description: With this Performance feature you can change the number of simultaneous connections made to a web server and improve the speed of accessing data. HTTP (HyperText Transfer Protocol) is the underlying language format used for the World Wide Web. There are two HTTP connection types: HTTP1.0 and HTTP1.1.
HTTP1.0 uses persistent connections and pipelining but Windows limits connections to HTTP1.0 servers to four simultaneous connections (this is considered a self-imposed restriction and it coincides with a number of other standards used with popular Web browsers.
HTTP1.1 is limited by Windows to two simultaneous connections based on the RFC2068 specification. By adjusting this performance items you affect any Internet application requiring these protocols including Internet Explorer.
 When changing the HTTP settings you are acknowledging that you are causing Windows to break HTTP protocol specifications for Internet applications accessing the Web on your system.
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Select Items
By default all items are selected in the Results list. You can choose to clear any item so it is not included when fixing registry errors.
To clear an item, do the following:
Clear the associated check box.
Ignore Items
When you review the registry errors you can choose to clear the items you do not want fixed. You also have the option of sending items to the Ignore list so they are not detected in upcoming scans. See the Ignore List page for more.
To ignore an item, do the following:
Right-click an item in the list and select Ignore.
Optimize
When you have finished reviewing and making selections from the list you can optimize Internet performance.
Keep in mind that a system restore point is created before the TuneUp is complete so that you can revert the changes. See the Backup & Restore page for more.
To optimize the items that are list, do the following:
Click the Optimize button.
When you are finished you can return to the Main menu.
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