if you cannot complete any of them for whatever reason, just continue on with the next one until they are all completed.
However,it is extremely important to make mention of the fact that you could not complete any of the steps in your post to HiJackThis Log Help Forum. http://www.techsupportforum.com/security-center/hijackthis-log-help/
where an Analyst will assist you with other workarounds.
Once done, please be patient, as the Security Team Analysts are usually very busy; one of them will answer your request as soon as they can. .
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