I am adding this section now to save you time because of lag in post/reply.
If that Vundofix refinement works after the Combofix run some of this may be redundant, but perform the whole anyway:
Start hijackthis, select Scan Only, place checkmarks against all the entries listed below that still exist, and then press Fix Checked.
O2 - BHO: (no name) - {08A4D98A-864E-4BA2-998D-9C58EE7556C2} - C:\WINDOWS\system32\henclvoc.dll
O2 - BHO: (no name) - {31657B86-01E9-43C8-A0C5-F02BE201455c} - C:\WINDOWS\system32\henclvoc.dll
O2 - BHO: (no name) - {68218620-3D65-43F6-AD47-D38D84B5412A} - C:\WINDOWS\system32\ljjkheb.dll
O2 - BHO: (no name) - {9E7FA759-B446-4E57-AF42-A97A948B6CB3} - C:\WINDOWS\system32\henclvoc.dll
O2 - BHO: (no name) - {9F0AD5E8-002F-4666-8F74-B5457C89FDD0} - C:\WINDOWS\system32\nxmjexch.dll
O2 - BHO: (no name) - {A8CE4D48-E68D-4FE4-89FE-300731C77148} - C:\WINDOWS\system32\nxmjexch.dll
O2 - BHO: (no name) - {B064D7DD-F68F-4D03-9C37-C86C2D72D4B7} - C:\WINDOWS\system32\nnsqqmqc.dll (file missing)
O2 - BHO: (no name) - {C3415EC8-E19C-4147-A819-604490CEF483} - C:\WINDOWS\system32\ssqrr.dll
O2 - BHO: (no name) - {E5D48306-2B38-4D8C-B74C-8C4F420E02F2} - C:\WINDOWS\system32\henclvoc.dll
O4 - HKLM\..\Run: [SearchIndexer] rundll32.exe "C:\WINDOWS\system32\gewhpgsa.dll",sitypnow
O20 - Winlogon Notify: ljjkheb - C:\WINDOWS\SYSTEM32\ljjkheb.dll
O20 - Winlogon Notify: ssqrr - C:\WINDOWS\system32\ssqrr.dll
O21 - SSODL: hirtellous - {fa19bd7e-50bc-4203-80ac-c4edc81ca9a3} - (no file)
O22 - SharedTaskScheduler: hirtellous - {fa19bd7e-50bc-4203-80ac-c4edc81ca9a3} - (no file)
==Download killbox from here:- http://www.downloads.subratam.org/KillBox.zip -unzip it onto your desktop.
Dclick killbox to start it.
>Highlight the pathnames in the following lines as one block and copy them into clipboard [press Ctrl+C] [ or rclick, copy...]:-
C:\WINDOWS\system32\henclvoc.dll
C:\WINDOWS\system32\nxmjexch.dll
C:\WINDOWS\system32\ljjkheb.dll
C:\WINDOWS\system32\ssqrr.dll
C:\WINDOWS\system32\gewhpgsa.dll
>In killbox, go File menu, …