Cool.
Here's what I would do:
Go to start menu | all programs | startup folder.
Delete Driver Updater and Search Protection
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There is a slightly newer video driver available from NVIDIA to install:
http://www.nvidia.com/object/win7-winvista-64bit-257.21-whql-driver.html
Current driver in use is from April 23, 2010. This new one in from May 15, 2010.
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Your Realtek High Definition Audio driver is old from July 14, 2009. Here is the latest update for it:
http://www.realtek.com.tw/downloads...=24&Level=4&Conn=3&DownTypeID=3&GetDown=false
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You can visit the Asus site I linked you to, to get the latest Atheros L1 Gigabit Lan driver to install. The one you currently have now is a little older and should be updated. It's from July 14, 2009.
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Your D-Link Airplus G DWL-G510 Wireless PCI adapter driver
definitely needs an update. It is currently from November 12, 2006 which is most likely causing issues.
As you can see, there seems to be no newer x64 driver for it. Because of this, I'd have to recommend removing it from the system if all else fails to fix the problem, as a test.
http://www.dlink.com/products/?tab=3&pid=DWL-G510&rev=DWL-G510_revB
If physically removing it fixes the problem, you'll need to purchase a newer wireless card that is compatible with Windows x64.
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Since you don't seem to have any antivirus installed, the freezes could be malware related. Please download, install, run then update the definitions in the program called Malwarebytes. Then let it scan your system and remove anything it finds.
http://www.malwarebytes.org/
After, I recommend installing MSE for an antivirus.