Security Alert ssvagent.exe removed but still a problem

Hello
The computer has administrator and three other standard users - one of the standard users had the above Security Alert spyware and she couln't access any programmes. After a scan with her antivirus and malwarebytes in normal mode, the spyware was removed and the files were deleted.

The problem now is that, again on the standard user who had the original problem, when she clicks any software or programme the box comes up asking to choose what programme to open it in - internet explorer and quicktime are the options within the box but you can browse.

I really would appreciate your help to sort this out.

Platform: Windows Vista SP2 (WinNT 6.00.1906)
MSIE: Internet Explorer v8.00 (8.00.6001.18882)
Boot mode: Normal

Running processes:
C:\Windows\system32\taskeng.exe
C:\Program Files\Microsoft Windows OneCare Live\winssnotify.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Windows\RtHDVCpl.exe
C:\Program Files\Launch Manager\HotkeyApp.exe
C:\Program Files\Synaptics\SynTP\SynTPStart.exe
C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
C:\Windows\System32\hkcmd.exe
C:\Windows\System32\igfxpers.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\BBC iPlayer Desktop\BBC iPlayer Desktop.exe
C:\Windows\system32\igfxsrvc.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\Program Files\IncrediMail\bin\IMApp.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Google\Google Toolbar\GoogleToolbarUser_32.exe
C:\Windows\system32\Macromed\Flash\FlashUtil10c.exe
C:\Windows\system32\DllHost.exe
C:\Users\Cathryn\Downloads\winlogon.scr

O23 - Service: Fujitsu Siemens Computers Diagnostic Testhandler (TestHandler) - Fujitsu Siemens Computers - C:\Program Files\Fujitsu Siemens Computers\SystemDiagnostics\OnlineDiagnostic\TestManager\TestHandler.exe
O23 - Service: WisLMSvc - Wistron Corp. - C:\Program Files\Launch Manager\WisLMSvc.exe

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End of file - 1657 bytes

Help - I am running as administrator although it Hijack tool shows an error when loading the test files.

Hello.

Download OTL by OldTimer to your Desktop.

• Close all windows and double click OTL.exe
  
• Click Run Scan and let the program run uninterrupted
  
• It will produce two logs for you, one will pop up - OTL.txt, the other will be saved on your Desktop - Extras.txt. Post both logs in this thread.
  
• You may need to use two posts to get it all.