The tracing cookie or traffic cookie are common events depending on personal surfing habit. It's not malicious. You can use ATF-Cleaner to clean it on a regular basis.
App/PSexec would be Sysinternals psexec. but i didn't see any Sysinternals products installed in your system. Since it's no more needed and your AV alerts it, we can remove it. Please navigate to the following file path and delete it.
Since your problem is not malware related, I will recommend you post your problem in some IT Forums if you feel comfortable. Other than that, We need to do some tidy up. Step1
Now copy/paste Combofix /u
in runbox and click OK.
Note the space between the X and the U, it needs to be there.
This will uninstall Combofix, delete its related folders and files, reset your clock settings, hide file extensions, hide the system/hidden files and resets System Restore again.
Remember to re-enable Sympatico antivirus real time protection, and delete the RIST and the folder
Tell me how things running now and your decision.