system
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Your version of Avast is way outdated. Please take these steps and report back. Also your processor is very old. How much ram do you have?
Download:
- http://www.avast.com/uninstall-utility
- http://www.majorgeeks.com/files/details/avast_free_edition.html
- Run the Avast uninstall tool. Be sure to select the correct version you are removing and point it to the installed directory.
- Reboot.
- Install Avast 8.0.1489.300.
Thanks. When viewing YouTube its not uncommon for your processor usage to go up. Mine does even on my pc’s with no antivirus. Streaming YouTube videos is heavily dependent upon your internet connection.