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Recently I brought my laptop from my work to my appartment. At work the laptop works perfectly in WLAN, but at home I have the following problems with WLAN:

  • When streaming movie from YouTube, the movie gets buffered only to a certain point. Then the buffering process stops. I'm usually able to trigger streaming again by either reopening the site or by starting streaming from yet unbuffered part of the movie.
  • Sending mails from Web mailbox often exceeds sending timeout and then fails
  • Web sites download slowly or some of the does not at all at the first request

How can I fix the problem or at least start diagnosing the cause?

Narrowing down the problem

I am far from being telecommunication expert, but I tried to narrow down the problem and I found that:

  • WiFi signal strenght is stable (from system tray)
  • Problems occurs only to my laptop (4 other laptos at our appartment work fine)
  • Problem occurs in different locations of my home, both close and far from the access point
  • When I connect to the router by cable, the connection is perfect
  • When I switch to a different WLAN (of some neighbour), the problem remains, but might be for another reason (weaker signal?)

I had similar problem with another laptop at home and it disappeared once I set up transmit power of its WiFi card to the max. In the newest laptop this trick did not help at all.

Technical details

  • OS: Windows 7
  • Wireless card: Intel Centrino Ultimate-N 6300 AGN
  • Router: Sitecom WL-612
  • WLAN security: WPA-Personal with TKIP encryption
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migrated from Nov 20 '11 at 19:12

This question came from our site for system and network administrators.

You may want to upgrade the firmware on your router and drivers on your wireless NIC. If this doesn't help then scan for the channels and see if you're using a popular one. If so, configure your router to use a different channel. – kobaltz Nov 20 '11 at 20:06

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