I tried, I failed, I need help

In the future please do not post HijackThis logs unless requested. You must only run one HijackThis session and you must run it the correct folder. You had:
C:\Documents and Settings\HP Authorized Custom\Desktop\hijackthis\HijackThis.exe <--- should not be running
C:\Program Files\hijackthis\HijackThis.exe <--- correct

Also you must exit ALL browsers ( C:\Program Files\Mozilla Firefox\firefox.exe ) before using HijackThis.

First goto Add/Remove programs and uninstall the below if found:
Viewpoint Manager <--- unless you use it. Most people do not.
WildTangent

You should not be running McAfee Virus scan online ( C:\WINDOWS\MCBIN\AV\RT\MGAVRTE.EXE ) when you already have Avast.


Click on Start, then Run ... type services.msc into the box that opens up, and press 'OK'. On the page that opens, scroll down to lsass or Local Security Authority System Service Then right click the entry, select 'Properties' and press 'Stop Service'. When it shows that it is stopped, next please set the 'Start-up Type' to 'Disabled'. Press 'OK' until you get back to Windows.

Next, open up HJT, but instead of scanning, click on the "None of the above, just start the program" button at the bottom of the choices. At the lower right, click on the 'Config" button, and then the Misc tools' button ... select 'Delete an NT Service" ... copy/paste the following into the box that opens, and press "OK":

lsass


If that does not work, try: Local Security Authority System Service


You may be told to reboot at this point. Do not reboot just exit HijackThis and we will be restarting it with different options in a moment.

If you are using WinXP or WinMe, make sure you have system restore disabled (per the tutorial).
For all OS types, make sure viewing of hidden files is enabled (per the tutorial).

Please run HijackThis and click on the "Open the Misc Tools Section" button on the open page. Then select "Open process manager" on the left-hand side. Look for the following process (or processes) and one at a time kill them by selecting it and then click "Kill process". Then click yes.

After killing all the above processes, click "Back".
Then please click "Scan" and select the following lines but DO NOT CLICK FIX until you exit all browser sessions including the one you are reading in right now:
O4 - HKLM\..\Run: [System Kernal Support] system.exe
O4 - HKLM\..\Run: [Services] C:\WINDOWS\csrss.exe
O4 - HKLM\..\RunServices: [System Kernal Support] system.exe
O4 - HKCU\..\Run: [System Kernal Support] system.exe
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O23 - Service: lsass (Local Security Authority System Service) - Unknown owner - C:\WINDOWS\lsass.exe

After clicking Fix, exit HJT.
Boot into safe mode and use Windows Explorer to delete:
C:\WINDOWS\csrss.exe <--- only delete the file in this folder. Do not delete the one in system32
C:\WINDOWS\lsass.exe <--- only delete the file in this folder. Do not delete the one in system32
C:\Windows\System32\system.exe

If you get an error when deleting a file. Right click on the file and check to see if the read only attribute is checked. If it is, uncheck it and try again. Other wise open Task Manager and kill the process if running then delete the file.

Now run Ccleaner (installed while running the READ ME FIRST). Now if running Win XP goto c:\windows\Prefetch and delete all files in this folder.

Now reboot in normal mode and post a new HJT log. And tell us how things are working.

 

You're welcome. You should now check out the below thread to help keep you clean:

How to Protect yourself from malware!