Redirections problem

Have same issue as 2 other posters before me.
Somehow it's only with Youtube and Amazon.
When I go to Amazon, this what pops up:
http://i302.photobucket.com/albums/nn101/ukrkoz/Capture_zpsf2c76165.png
And then I go back and to Amazon again, and Amazon comes up just fine.
Youtube starts with some Youtube lookalike full of adult ads, if you click on a link to a Youtube video, go back, click on that link again - and it will will go to the youtube video as supposed to.
I have done full blown PC cleanup as recommended in "redirection" sticky. Same issue. Any of those programs found no malware. Did malware bites and full scan with ESET AV - no malware found.
Help?

Also, why is it that I can not post reply to posts in this forum? Had none of that issue before.

 

Internet Explorer does not have this issue. Apparently it's Firefox issue.

 

Fixed it.
Now, before I say how, it came upon me that issues started when Java requested update several weeks ago. Thereafter my Firefox went berserk.
I restored PC to previous save point, but then started having the issues described.
My son advised me to have Adblocker + plug in enabled in Firefox, and that triggered me to look deeper into plug ins enabled.
Disabled both Java plug ins and that ws it, issue fixed.
Must be bugged Java then.

 

Yes, I did that. I am very well familiar with that thread, I had that guide used several times before.
Thank you.