...Now. This error comes up under any of the following conditions:
1. During log-on to Windows (either after boot-up or after changing user accounts). It will come up while the different icons are appearing in the Taskbar.
2. When starting IE (currently using IE7).
3. When going to browse the local drives (after right-clicking 'Start' and selecting 'Explore'). The Start Menu window will open and some of the contents of the computer will appear in the left pane, but then the error comes up. If I click on 'Don't Send', the error message disappears, and after a delay, the rest of the contents appear in the left pane and I can browse apparently without further incident.
...The 'Error signature' I get is this:
szAppName : svchost.exe szAppVer : 5.1.2600.5512 szModName : ntdll.dll
szModVer : 5.1.2600.5512 offset : 0000100b
...If I click to 'view technical information about the error report', I get this:
'The following files will be included in this error report:
...actually locating those files is somewhat difficult; otherwise I would copy and paste them in here.
...Anyway, I have done the first steps outlined in your malware and spyware removal, and still get the error. So, here is the MBAM log: