My pc is an old one -- windows xp home ed version 2002 sp2, 3, it updates itself . I use Firefox 39 instead of Internet Exp, It now crashes and freezes a lot.. what antivirus and firewall will help me? I had avast and uninstalled, and reinstalled. SuperAntiSpyware professional said it was highjacked or had a virus, I can't figure out what to do
Free Avast do not have Firewall. You need to pay for it. But even without firewall the Avast does a pretty decent job. I too have the same Windows XP with SP3, Firefox 39 and Avast Free version. Using the Avast for past 2 years. I don't have any problems.
The problem may be related to some malware. SuperAntiSpyware doesn't seem to be a reputed software. Read this - http/www.pcmag.com/article2/0,2817,2463191,00.asp
I protect my PC using Avast along with "AdwCleaner" or "Malwarebytes". Both are free of cost and are awesome against malwares/hijacks.
"Malwarebytes" might be a bit heavy, may slow down old systems. But an effective one. I suggest you use the "AdwCleaner", which you don't even have to install. Just download and run. Make sure you're connected to the internet, as it frequently updates virus definition files to stay up to date before every single scan.
Uninstall the SuperAntiSpyware professional.
Direct download link for AdwCleaner - http
How to use AdwCleaner - http
After the scanning is complete, you may be asked to restart your PC. Do so, to complete the cleaning process and after restart, a detailed log of actions taken will be presented to you.
Also make sure you have "Avast Online Security" extension and its enabled for Firefox. Open Firefox, use keyboard shortcut "Ctrl + Shift + A" and check under "Extensions" section.