First you need to create a folder for HiJackThis 'HJT' will do as if you make any changes 'fixes' there will be no backup made (it shouldn't be on the desktop or a temporary location). So if you make a mistake you will be unable to rectify it.
Create the new folder and drag the hijackthis.exe into it, there are many who also suggest changing the name to hijackthat.exe or donthijackthis.exe as some malware is on the lookout for the hijackthis.exe file name.
Now run HJT again, this time copy and paste the contents into your post if it is to large paste it into two consecutive posts. This means those trying to help, don't have to download a file to view it.
To me this looks suspicious and there are no hits on google for it, in itself suspicious, don't do anything about it yet until you have HJT in its own folder.
O10 - Unknown file in Winsock LSP: c:\windows\system32\aidlg.dll (why this has 12 occurrences is also strange unless it is because it is using 12 ports).
O4 - HKLM\..\Run: [Lexmark_X79-55] C:\WINDOWS\system32\lsasss.exe (this is a mash-up of a legit file lsass.exe so most suspicious)
You could also check the offending/suspect file at:
VirusTotal - Multi engine on-line virus scanner I feel virustotal is the better option as it uses the windows version of avast (more packers supported) and there are currently 32 different scanners.
Or
Jotti - Multi engine on-line virus scanner if any other scanners here detect them it is less likely to be a false positive.