Google Chrome has suddenly stopped working advice?

[Seriously Though]

I always use google chrome and this is the first time it has stopped working, I downloaded a program earlier to watch videos online so could this be something to with it maybe?? But basically how do I find out what the problem is? I'm using Safari at the moment and IE is also working correctly..just don't know why it happened! Any ideas??
Thanks
Shows this error:
Unable to access the network
Google Chrome is having trouble accessing the network.

This may be because your firewall or antivirus software wrongly thinks that Google Chrome is an intruder on your computer and is blocking it from connecting to the Internet.
Here are some suggestions:
Try adding Google Chrome as a permitted programme in your firewall or antivirus software's settings. If it is already a permitted programme, try deleting it from the list of permitted programmes and adding it again.
Error 138 (net::ERR_NETWORK_ACCESS_DENIED): Unable to access the network
not yet..will try

[SS4]

Probably,why would you download a program to stream videos (unless its vlc)

Have you done the old fashioned uninstall and reinstall

[takataone]

remove the program that you downloaded and see if google chrome now works again.

[Brad Ryan]

When I get that stuff happening I delete the offending software (do you really need it, find another recommended one if you do.
If it is not the software (or in my case, I did not download anything before it happened) uninstall chrome and re-install in. But to be honest this stopped happening to me from chrome 5.

The other thing is it could be temporary which happened to me a few weeks back. It lasted 2 days then just fixed it self.