As we say North of Watford "Help ma Boab!"
I've had a look through the list over the last hour and I don't envy your task.
I've saved a useful link that e-liam (I think) posted here a while back and it gives a good overview of what to look for in the log. Have a look at this
tutorial and see what you think.
Then, when you're ready to identify the dodgy stuff, try using the tools
here to identify the main Browser Helper Objects (BHOs) that are listed under the O2 items. The ones that worry me, because I can't find any reference to them anywhere, are the ones containing the path C:\\Program Files\\1xl709n9\\1xl709n9.dll. (what's with the double backslashes?)
That looks seriously dodgy, unless, of course, you know what it is.
There are others like VTrebootagent.exe that don't look good either. Judging by some of the entries the PC has been used for gaming and that's probably where a lot of the suspect stuff has come from. I find that my lads get a load of cr@p trying to pop up or offering to download itself when they visit gaming sites like fileplanet.
It all looks fixable, but it will take a bit of patience and effort.
When I get some more time I'll see if I can start doing a "liam" and be a bit more specific as to which lines need to be fixed, unless someone else beats me to it (please!)
Final question, and please don't take it the wrong way, but, would it be a disaster if the whole disk was wiped and the OS plus apps re-installed?
Good luck
ST