How do I get rid of a script running in my Facebook?

[Kelly Jo]

Every time I log in to Facebook, almost immediately a warning pops up saying "there is a script running" that can cause your computer to not respond. Do you want to close this script? This has recently started and it is causing my computer to run extremely slow!

[rohit]

I'd suggest you use Firefox with NoScript addon and don't use third party addons for facebook that are not officially supported by Mozilla. If its slowing your PC down, it means its due to a 3rd party software running on your system. Use resource monitor to check which process is using maximum CPU, memory or writing/reading on the HDD.
Ask if its not solved.
Hope this helps

[Fanaticalboundary888]

Are you sure the script is legitimate.

Run malwarebytes anti-malware to help ensure you do not have another program trying to hijack your computer.

It is free.