Run hijackthis again and put a checkmark against these entries....double check
in case you miss anything....
.....then,close all browser and outlook windows and "fix checked"
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = about:blank
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\WINDOWS\SYSTEM\blank.htm
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
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O2 - BHO: (no name) - {86C7FAF2-90A6-4AFA-9553-EC5875E9450C} - C:\WINDOWS\System32\doajoob.dll
O4 - HKLM\..\Run: [SysService32] C:\WINDOWS\systask32l.exe
O4 - HKCU\..\RunServices: [Image] rundll32 C:\WINDOWS\image.dll,Install
O4 - Startup: Go!Zilla.lnk = C:\Program Files\Go!Zilla\gozilla.exe
O4 - Global Startup: Go!Zilla.lnk = C:\Program Files\Go!Zilla\gozilla.exe
O8 - Extra context menu item: Download with Go!Zilla - file://C:\Program Files\Go!Zilla\download-with-gozilla.html
Reboot into safe mode by following instructions here: http://helpdesk.its.bethel.edu/resnet/Documents/Antivirus/Safemode.html
then as some of the files or folders you need to delete may be hidden do this:
Open Windows Explorer & Go to Tools > Folder Options. Click on the View tab and make sure that "Show hidden files and folders" is checked. Also uncheck "Hide protected operating system files" and untick "hide extensions for known file types" . Now click "Apply to all folders"
Click "Apply" then "OK"
Locate and remove:
C:\Program Files\Go!Zilla [folder]
C:\WINDOWS\systask32l.exe
Back in normal mode....
Download AdAware 6 181 from here: http://www.lavasoftusa.com/
Before you scan with AdAware, check for updates of the reference file by using the "webupdate".
Then ........
Make sure the following settings are made and on -------"ON=GREEN"
From main window :Click "Start" then " Activate in-depth scan"
Then......
Click "Use custom scanning options>Customize" and have these options on: "Scan within archives" ,"Scan active processes","Scan registry", "Deep scan registry" ,"Scan my IE Favorites for banned URL" and "Scan my host-files"
Then.........
Go to settings(the gear on top of AdAware)>Tweak>Scanning engine and tick "Unload recognized processes during scanning" and "Let windows remove files in use at next reboot"
Then...... click "proceed" to save your settings.
Now to scan it´s just to click the "Scan" button.
When scan is finished mark everything for removal and get rid of it.(Right-click the window and choose"select all" from the drop down menu)
Now re-boot...
Then
Download Spybot - Search & Destroy from http://security.kolla.de
After installing, first press Online, and search for, put a check mark at, and install all updates.
Next, close all Internet Explorer and OE windows, hit 'Check for Problems', and have SpyBot remove all it finds that is marked in RED
Run an online antivirus check from at least one and preferably 2 of the following sites....
http://security.symantec.com/default.asp?
http://housecall.trendmicro.com/
http://www.pandasoftware.com/activescan/
http://www.ravantivirus.com/scan/
Re-boot again.
Then post a new HijackThis log to check what is left.

in case you miss anything....
.....then,close all browser and outlook windows and "fix checked"
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = res://C:\WINDOWS\System32\doajoob.dll/sp.html (obfuscated)
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = about:blank
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\WINDOWS\SYSTEM\blank.htm
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
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O2 - BHO: (no name) - {86C7FAF2-90A6-4AFA-9553-EC5875E9450C} - C:\WINDOWS\System32\doajoob.dll
O4 - HKLM\..\Run: [SysService32] C:\WINDOWS\systask32l.exe
O4 - HKCU\..\RunServices: [Image] rundll32 C:\WINDOWS\image.dll,Install
O4 - Startup: Go!Zilla.lnk = C:\Program Files\Go!Zilla\gozilla.exe
O4 - Global Startup: Go!Zilla.lnk = C:\Program Files\Go!Zilla\gozilla.exe
O8 - Extra context menu item: Download with Go!Zilla - file://C:\Program Files\Go!Zilla\download-with-gozilla.html
Reboot into safe mode by following instructions here: http://helpdesk.its.bethel.edu/resnet/Documents/Antivirus/Safemode.html
then as some of the files or folders you need to delete may be hidden do this:
Open Windows Explorer & Go to Tools > Folder Options. Click on the View tab and make sure that "Show hidden files and folders" is checked. Also uncheck "Hide protected operating system files" and untick "hide extensions for known file types" . Now click "Apply to all folders"
Click "Apply" then "OK"
Locate and remove:
C:\Program Files\Go!Zilla [folder]
C:\WINDOWS\systask32l.exe
Back in normal mode....
Download AdAware 6 181 from here: http://www.lavasoftusa.com/
Before you scan with AdAware, check for updates of the reference file by using the "webupdate".
Then ........
Make sure the following settings are made and on -------"ON=GREEN"
From main window :Click "Start" then " Activate in-depth scan"
Then......
Click "Use custom scanning options>Customize" and have these options on: "Scan within archives" ,"Scan active processes","Scan registry", "Deep scan registry" ,"Scan my IE Favorites for banned URL" and "Scan my host-files"
Then.........
Go to settings(the gear on top of AdAware)>Tweak>Scanning engine and tick "Unload recognized processes during scanning" and "Let windows remove files in use at next reboot"
Then...... click "proceed" to save your settings.
Now to scan it´s just to click the "Scan" button.
When scan is finished mark everything for removal and get rid of it.(Right-click the window and choose"select all" from the drop down menu)
Now re-boot...
Then
Download Spybot - Search & Destroy from http://security.kolla.de
After installing, first press Online, and search for, put a check mark at, and install all updates.
Next, close all Internet Explorer and OE windows, hit 'Check for Problems', and have SpyBot remove all it finds that is marked in RED
Run an online antivirus check from at least one and preferably 2 of the following sites....
http://security.symantec.com/default.asp?
http://housecall.trendmicro.com/
http://www.pandasoftware.com/activescan/
http://www.ravantivirus.com/scan/
Re-boot again.
Then post a new HijackThis log to check what is left.