My laptop is running really slowly and keeps coming up with the message 'website' is not responding due to long running script'. Whichever webpage does eventually respond but it takes ages.

Does anyone know what this means and how I can stop this?

Thanks

Could have a virus, run a virus killer...also run scandisk, you might have lots of bad sectors on your hard drive, it could also be your hard drive packing in

try ccleaner, its usualy very good

Agreed
http://www.filehippo.com/download_ccleaner/
run both
http://www.filehippo.com/download_malwarebytes_anti_malware/

Thanks Brady and Vanman, that seems to have worked.

Your Welcome

Your very welcome ;o)