OK, first-
The " C:\WINDOWS\system32\spoolsv.exe" entry could indicate a virus, although the file can also be a legit component of Windows' printing subsystem. Check the link below for more info and run a full anti-virus scan of your system, making sure you've got the latest virus definition updates for your AV proggie installed:
http://www.sophos.com/virusinfo/analyses/trojgraybirda.html
Also, have HJT fix these:
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = res://C:\WINDOWS\System32\jnfinh.dll/sp.html (obfuscated)
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
Have you run SpyBot and Ad Aware yet? If not, look through some of the other threads here for instructions on how to download and use those programs. Run them after you do your virus scan, let them fix what they find, and then post a fresh HJT log.