Switching browsers.

Am ashamed to ask this question with so many competent people on here but here it goes. I am so computer illiterate that during a life changing experience Internet Explorer asked me to upgrade to IE 8.
Things got horrible after that, tower seemed to run constantly and getting online was absurd.
Remembered that my great friends on here said Mozille@Firefox was the way to go. Worked OK for a day and then got message that computer had memory problems. Deleted, to me, tons of stuff, that I never used. Did a Crap Cleaner, Super Anti Virus and Spybot Search & Destroy, as well as let AVG do a complete scan. First time AVG ever came back w/a warning and a cleaning. Was this because I was a whore w/2 browsers? I did not designate between IE or Firefox , for a couple of days, as my designated browser. Microsoft sent me a message that firewall was confused. Please explain how one keeps in conttrol?

 

If it were my computer, I would uninstall IE 8. That would take you back to IE 7, assuming you were using IE 7 prior to installing IE 8.

 

The only negative messages I have ever received from AVG were:
TROJAN HORSE SHeur 2APWC
Potentially harmful program Hack Tool H
My son and I are the only people that use this computer at the moment.

 

Yes to my knowledge AVG did it's job. I went through the computer maintenance protocol before I bothered anyone but I will review it again. That is why I have AVG, Spybot and Super Anti Spyware. Was geting weird update messages from SSanti that would never perform during this period of time. Firefox seems to be working fine, I am leery of IE. Someone else suggested to uninstall IE8 but, remember I am computer illiterate, when I went to the uninstall portion of my computer it is not on there which logically tells me it is not a program and must be accessible somewhere else. "Malwarebytes" is reccomended?

 

Here's a reference on uninstalling IE 8 if you want to proceed with that: How do I uninstall or remove Internet Explorer 8?