Computer theory.
The firewall has officially been activated to keep out the unidentified viruses.
Viruses are bad.they are malignant. they infect the computer and cause destruction to the computer's functioning.
This stupid computer has allowed the virus to enter.Now, the computer gotta depend on its own anti-virus software and external softwares to remove the virus. REMOVE.
If necessary,reformat the computer before it causes any more destruction.