GIF images won't animate in browser

Hi not sure whether this is the right place to start a thread like this however I couldn't find a more suitable place to put this.

I have recently returned from the dark side (Norton Internet Security) and installed AVG Antivirus Free edition and Zone alarm Pro full edition, however on successful installation and enabling all programs (that are safe) to be forwarded on Zone alarm pro, now mine and everyone elses GIF images will not show as a moving image but rather as a dismal still life picture, I have tried disabling Zone alarm firewall however this does not bring the life back to my GIFS.

The GIF images animate just fine on my desktop however when it comes to my browser (Mozilla Firefox) trying to display them it goes horribly wrong. Also I have just checked it using Internet Explorer to see if Firefox was to blame however IE will not show the GIF images moving either.

I will add that all GIF images were fully working before however after installation they do not.

Any help would be greatly appreciated and all donations will go towards the 'save the GIFS fund'

[bold]Cheers no need to reply as problem has been sorted, mods thread can be closed anytime you deem neccessary [/bold]