access
antivirus
attack
black
block
bug
communication
computer
computer down
computer networks
computer system
computer system breach
crash
cyber
cyber attack
deadlock
firewall
flaws
hackers
it
it security
network
operating
operating system
paralysis
pc
programmer
programming
protection
screen
software
system
systems
technology
terminal
virus
定額
Computer black screen, indicating system error. Viruses and blocking of computer systems.の素材 [FY310234954799]
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