cannot search from address bar

during the last few days, when i try to search from the address bar, I am directed to 'perfectnav' that says 'the site you entered can not be found. I have located and removed perfectnav files from computer, it still doesn't work. i tried resetting internet defaults, still nothing.
Help!! even when i try to use the MSN search button on my toolbar, a blank window opens with no search options. ack!

 

http://www.kephyr.com/spywarescanner/library/perfectnav/index.phtml

You've been hijacked!

 

Download Adaware Se from http://www.lavasoftusa.com/support/download/
In Ad-aware click the Gear to go to the Settings area.
The following items should be on a green check, not on a red X.
Under the Scanning button:Scan within archives
Under Memory & Registry, Check EVERYTHING
In Check Drives & Folders, make sure all of your hard drives are selected
Under the Advanced button, Check
Move deleted files to recycle bin
Include additional object information
Include negligible object information
Include environment information
Under the defaults button Set the homepage you wish to have set as default.
Under the tweak button
Some of these may not be an available option, depending on your version of Ad-aware and your version of Windows. Do not be concerned if you cannot select a certain item.

In Scanning Engine:Unload recognized processes during scanning
Include info about ignored objects in logfile, if detected in scan
Include basic Ad-aware settings in logfile
Include additional Ad-aware settings in logfile
Include used command line parameters in logfile
In Cleaning Engine: XP/2000: Allow unloading explorer to unload shell extensions prior to deletion
Let Windows remove files in use at next reboot
UNCHECK: Automatically try to unregister objects prior to deletion
Click Proceed to save these settings. When you would like to perform a "Full Scan," switch the scan mode from SmartScan to Custom
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Create a folder on your hard drive somewhere like in "My Documents" and name it Hijackthis
Download 'Hijack This to its own folder http://www.dotcomsecurity.org/downloads/HijackThis.exe
Doubleclick HijackThis.exe, and hit "Scan".

When the scan is finished, the "Scan" button will change into a "Save Log" button.
Press that, save the log, load it in Notepad, and copy its contents here.

Most of what it lists
will be harmless or even essential, don't fix anything yet.
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