Asus laptop will not stay connected to the internet? (Wireless)?

[Terra]

Suddenly, my fiance's ASUS laptop will not stay connected to the internet.
Sometimes it will work for hours before cutting out, other times a few seconds.

At times he will even have to shut his laptop down before re-trying/
His laptop is 2 years old.

The only recent thing has done, was a driver booster update by Iobit.

His DXDiag:

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System Information
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Time of this report: 3/27/2014, 18:12:54
Machine name: KINOKO-PC
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130828-1532)
Language: English (Regional Setting: English)
System Manufacturer: ASUSTeK Computer Inc.
System Model: U56E
BIOS: BIOS Date: 07/26/11 15:04:48 Ver: 04.06.03
Processor: Intel® Core™ i5-2430M CPU @ 2.40GHz (4 CPUs), ~2.4GHz
Memory: 6144MB RAM
Available OS Memory: 6050MB RAM
Page File: 2941MB used, 9154MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode

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DxDiag Notes
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Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Input Tab: No problems found.

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DirectX Debug Levels
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Direct3D: 0/4 (retail)
DirectDraw: 0/4 (retail)

[?]

My spoon is too big

[Boris 24]

1.Update Wireless Network driver.Do Update from Device Manager.
2.If it won't help buy external USB wireless Network adapter.

[prapradeliko]

What about any other wireless connected laptop in the house ? Does it also loose connection ? I mean you should compare it to something else as it might be faulty modem . If you take laptop to the friend with wifi does it drop connection there as well ?