Many browsers start, fake virus scanner running

Hi,
No worries. That should be ok.
Let's proceed.

First,
Uninstall List.

• Run the HiJack This.
• Click on Open the Misc Tools section button.
• Click on Misc Tools tab.
• Under the System tools, click on Open Uninstall Manager button.
• Find the Save list… button and save to the Desktop
• Copy the content and paste the uninstall list here.

Next,
Checklist.
Please post.

• Content of uninstall list.

Here is the HT uninstall list:

Acrobat.com
Acrobat.com
Activation Assistant for the 2007 Microsoft Office suites
Adobe AIR
Adobe AIR
Adobe Reader 9.2
Adobe Shockwave Player
Amazon MP3 Downloader 1.0.3
Apple Application Support
Apple Mobile Device Support
Apple Software Update
Atheros Driver Installation Program
avast! Antivirus
Bonjour
Compatibility Pack for the 2007 Office system
Conexant HD Audio
DirectX Media Runtime 5.1
EA Link
ERUNT 1.1j
ESU for Microsoft Vista
GIMP 2.6.3
GPL Ghostscript 8.63
HDAUDIO Soft Data Fax Modem with SmartCP
Hewlett-Packard Active Check
Hewlett-Packard Asset Agent for Health Check
HijackThis 2.0.2
Hotfix for Microsoft .NET Framework 3.5 SP1 (KB953595)
Hotfix for Microsoft .NET Framework 3.5 SP1 (KB958484)
HP Customer Experience Enhancements
HP Doc Viewer
HP DVD Play 3.6
HP Easy Setup - Frontend
HP Games
HP Help and Support
HP Photosmart Essential 2.5
HP Product Detection
HP Quick Launch Buttons 6.30 E2
HP Smart Web Printing
HP Total Care Advisor
HP Update
HP User Guides 0093
HP Wireless Assistant
HPNetworkAssistant
HTML Slideshow Powertoy for Windows XP
Intel(R) Graphics Media Accelerator Driver
Intel(R) Matrix Storage Manager
Intel(R) TV Wizard
iTunes
Java(TM) 6 Update 17
JumpStart 2nd Grade v1.1
Malwarebytes' Anti-Malware
Microsoft .NET Framework 3.5 SP1
Microsoft .NET Framework 3.5 SP1
Microsoft Office Live Add-in 1.4
Microsoft Office PowerPoint Viewer 2007 (English)
Microsoft Picture It! Express 7.0
Microsoft Silverlight
Microsoft Virtual PC 2007
Microsoft Visual C++ 2005 ATL Update kb973923 - x86 8.0.50727.4053
Microsoft Visual C++ 2005 Redistributable
Microsoft Visual C++ 2008 ATL Update kb973924 - x86 9.0.30729.4148
Microsoft Visual C++ 2008 Redistributable - x86 9.0.21022
Microsoft Works
MSCU for Microsoft Vista
MSXML 4.0 SP2 (KB936181)
MSXML 4.0 SP2 (KB941833)
MSXML 4.0 SP2 (KB954430)
MSXML 4.0 SP2 (KB973688)
NetWaiting
OpenOffice.org 2.4
Quicken 2007
QuickPlay SlingPlayer 0.4.4
QuickTime
Realtek 8139 and 8139C+ Ethernet Network Card Driver for Windows Vista
Rosetta Stone Ltd Services
Scribus 1.3.3.12
Sony Picture Utility
Stratego
Touch Pad Driver
Update for Microsoft .NET Framework 3.5 SP1 (KB963707)
Wal-Mart Music Downloads Store
WeatherBug Gadget
Windows Live ID Sign-in Assistant

Hi,
I'm glad to tell you once again.

Important.
WEATHERBUG
WeatherBug is a system tray icon that offers weather information and includes built-in ads. WeatherBug is controlled by AWS Convergence Technologies (weatherbugmedia.com). There is some controversy over whether WeatherBug should be targeted by anti-parasite software. AWS strongly deny their software is 'spyware', and by the definition used here, it is not, as it does not leak information back to its controlling servers. However, WeatherBug has in the past been silently installed by the FavoriteMan parasite and Freeze.com screensavers, and more recently has been bundled by software such as AIM and Blubster. This makes it 'unsolicited', and since it is installed to raise money for its creators through the built-in ads it is certainly 'commercial'. So it does meet the definition for 'parasite': unsolicited commercial software. It is nonetheless listed as a borderline case because it is not overtly harmful and many people do install it deliberately. WeatherBug bundles the MySearch parasite in its standalone distribution and has in the past, installed Gator and SVAPlayer.

I recommend that you uninstall WeatherBug and choose one of these alternatives:

• Weather Pulse
• Weather Watcher
  or
• Get Mozilla Firefox and then get FORECASTFOX!!!

Please uninstall WeatherBug now.

Other than that :

Good!
Your system now is clean.
Let's do some cleaning and management.

Please note: Due to the restrictions on Vista, all tools should be started by Right-Click ---> Run As Administrator

SpywareBlaster.

• SpywareBlaster help your Internet Explorer more strong as it will help to block known malicious ActiveX
• A tutorial on installing & using this product can be found HERE

WinPatrol.

• Unwanted things always occur behind your knowledge. Let's this software take the snapshot of it.
• For more information and installation can be found HERE

Windows/Program Update.
Please make sure to have your Windows Automatic Update turn ON or you can use as below :

Windows Vista
Update your Windows regularly.
Any doubt on how it can be done, please refer HERE

You always can refer at both website to check either any updates are needed for your system.

• Secunia Software Inspector
• F-secure Health Check

Information.

• Please check out Tony Klein's article "How did I get infected in the first place?"
• Read some information here how to prevent Malware.
• Is your pc running slow? Read What to do if your Computer is running slowly

Happy safe surfing!