system
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I did the same but installed ad aware free antivirus. Hopefully avast will be working for me again.
@essexboy after win8.1 update avast was missing I just reinstalled new version 2014 of avast - not working
then I did a system restore and reinstalled 2014 version - not working
Then I followed your suggestion and ran the uninstall utility and then reinstalled 2014 - not working
Thanks for your help hopefully after a few months and windows updates all the issues will be sorted then ill install avast again.