Glad you got it sorted out. I think very highly of PC Pitstop, and use it frequently. Another valuable site for checking out suspected browser problems is: www.browsertune.com,
run by Fred Langa. Fred's site is listed as a resource on www.pcpitstop.com,
and is well reviewed by folks such as TechTV and AboutComputers. Both are free, but offer ample opportunity to spend money if you wish. Just remember to set a restore point, if available with your OS, before executing any recommended changes.
I'll keep my eye on this topic for a while, and if there are no further issues, I'll mark it "Resolved".