No instant Wlan connection when starting up Satellite L650

Hello,
I have had connection problems with my L650 Toshiba for the past couple of months.
I bought my laptop a year ago (October 2010), and everything was working perfectly until April 2011.
The first few months, my computer would connect automatically to the internet once it started up.
Since April 2011, my computer takes about 2 minutes to connect to a wireless internet connection when I start it up, whether it is my home connection or work connection.
Once it does connect, the wireless connection works perfectly.
The problem does not come from a wireless router because it happens with all wireless connections. Furthermore, I have tried updating the drivers for the wireless adapter (Broadcom 802.11n) with no success at all.
I would be grateful if someone could provide possible solutions to the problem.
Thanks in advance.

So what is the problem exactly?
The Wlan connects fine but it takes two minutes until the connection has been established?
Right?
Well, it could be possible that something is running in the OS background and therefore it takes some time until the notebook could connect to the Wlan.
In my case the notebook needs some time to connect to Wlan because the virus scanner and CCleaner run at the startup and scans the HDD and the system.
After that the notebook connects to Wlan.

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At first I thought, the problem could be caused by the KDE power saving settings. I changed the settings, so nothing happens when I close the lid (no hibbernation or screen lock or something like that), but without success (the wlan connection is still unstable under the described circumstances).
Also dmesg shows nothing that points out a problem (as far as I can see):
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[ 19.688522] iwlwifi 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 19.688679] iwlwifi 0000:03:00.0: irq 31 for MSI/MSI-X
[ 19.696095] iwlwifi 0000:03:00.0: loaded firmware version 18.168.6.1 op_mode iwldvm
[ 19.718023] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUG disabled
[ 19.718027] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUGFS disabled
[ 19.718028] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[ 19.718029] iwlwifi 0000:03:00.0: Detected Intel(R) Centrino(R) Advanced-N 6205 AGN, REV=0xB0
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[ 19.753757] iwlwifi 0000:03:00.0 wlp3s0: renamed from wlan0
[ 20.128443] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[ 20.128652] iwlwifi 0000:03:00.0: Radio type=0x1-0x2-0x0
[ 20.403905] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[ 20.404212] iwlwifi 0000:03:00.0: Radio type=0x1-0x2-0x0
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So I have no idea where this strange behaviour comes from (only wild guesses: buildfactor, antenna orientation,...).
Any help would be really appreciated.

hmmm...
how about checking both your wired and wireless nic drivers in device manager to make sure that the "allow computer to turn off this device to save power" checkbox on the power management tab is deselected.
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