It is called hacking
A hacker
Unauthorized access is the use of a computer or network without permission. Unauthorized use is the use of a computer or its data for unapproved or possibly illegal activities.
Security
Unauthorized
That's called a firewall.
stolen personal information. Damage to the computer system and/or network. Always protect your computer and network. theres more disadvantages...but use your head and think..
Below is additional information about helping to secure your computer and prevent any unauthorized access from other people or software programs; helping keep your information safe.
if you mean the term virus, but if you mean the person a hacker unauthorized acces to your pc.
anti spyware
computer virus
The attempted or successful unauthorized access, use, disclosure, modification or destruction of information or interference with system operations in an information system is called:
It makes the computer vulnerable to unauthorized access through the network.
The computer Misuse Act of 1990 made provision for securing computer material against unauthorized access or modification. Its impact to people is to refrain from any unauthorized use of computer data.