Vista Tip: Fix Slow Web Browsing

March 20, 2010

If you are running a Vista ‘powered’ machine, you may notice your web browser’s page loading suddenly becoming veeery slooow.

This annoyance is browser agnostic — it affects Firefox, Chrome and IE equally.

There are many potential causes, but the main one seems to be the result of something called tcp autotuning, which is another Windows attempt to ‘enhance your browsing experience’

To find out if this is making your web surfing slower than a snoozing snail, you can try turning off or disabling autotuning.

Here’s how:

In the search window of your menu, type the word, ‘cmd’

Windows 7 menu shown. Vista menu similar

Windows 7 menu -- Vista is similar

Now hold down the control key and the shift key, and press the enter key.

The ‘User Access Control’ warning pop up will alert you about making system changes.

User Access Control message

User Access Control warning pop up

Click Yes

The windows command prompt box will appear

Windows Command Prompt

Windows Command Prompt -- Administrator level

Type netsh int tcp set global autotuninglevel=disabled

Windows Command Prompt with command line entered

Command entered

Press the enter key

Now you may dismiss the command prompt

You should restart windows to make sure the change takes effect.

Try browsing, and see if there’s any speed improvement..

If you experience problems, simply repeat the procedure, but at the end of the command type, ‘enabled’, to re-activate tcp autotuning.

A future post will explain in more detail, and offer advanced tips for additional Vista networking tweaks

pnetsh int tcp se

Pret global autotuninglevel=disablednetsnetsh int tcp set global autotuninglevel=disabledh int tcp set global autotuninglevel=disabled

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