Microsoft is with America's National Security Agency (NSA). It said the WannaCry cyber-attack was the NSA stores cyber-weapons. Ransomware is that blocks computers until the pays to . The NSA helps keep America's communications and systems safe. It also stops cyber-attacks. However, say the WannaCry hackers used tools from the NSA.
Microsoft said governments must wake up to the of cyber-weapons. Stealing them is as as stealing . Microsoft said the WannaCry attack shows keeping cyber-weapons is a problem. Europe's said WannaCry harmed 200,000 in 150 . It made many problems for Britain's . Many were cancelled. Experts told people to back up their files because more could come.