[Solved] Very slow

In the last few days my PC has run very slowly with everything now taking far longer to happen. On my browser IE or firefox , my email & web sites I consistently get " not responding " with just the blue circle going round & round. Often I get a message " Warning : unresponsive script " then an option to " continue, debug or stop " there is also a name given to the script, different each time, the latest was...........
Script: resource://gre/modules/commonj…nsion/data/mutation-summary.js:432

Can anyone help please?
I have run superantispyware & malawarebytes.

 

Hi Tony. With Firefox Browser this may help you.

https://support.mozilla.org/en-US/kb/warning-unresponsive-script

 

Thanks for that Dougie. Have tried a few of these options although I am a novice so probably not done it properly but problem persists. Also its not only a firefox issue.

 

I once had this issue Tony and in my case a Browser "add on" was the culprit.
I would disable all ADD ON's in both Browsers and see if the problem persists.

 

Thanks Dougie that seems to have solved it...........much obliged.

 

Your Welcome.

 

Good one Dougie!