My computer keeps freezing on me every 15 min do i have a virus I was told when you have mozilla firefox you don't need virus protection is that true and how can I scan if I have a virus and now do i get rid of it?

# Question
My computer keeps freezing on me every 15 min do i have a virus I was told when you have mozilla firefox you don't need virus protection is that true and how can I scan if I have a virus and now do i get rid of it? edit

Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]
* [[Troubleshooting plugins]]
If it does work in Safe-mode then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
* Use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
* Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")
There are other things that need attention:
Your above posted system details show outdated plugin(s) with known security and stability risks that you should update.
# Shockwave Flash 10.0 r32
# Next Generation Java Plug-in 1.6.0_21 for Mozilla browsers
Update the [[Managing the Flash plugin|Flash]] plugin to the latest version.
*http://www.adobe.com/software/flash/about/
Update the [[Java]] plugin to the latest version.
*http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE)

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