Using Windows XP in 2019
Windows XP was first released in 2001 and reached end of life on 8th April 2014. This is when the last Windows security updates were added to Windows Update and Microsoft ceased creating any more patches or fixing any vulnerabilities.
This makes Windows XP systems an easy target for would be hackers and malware creators due to known vulnerabilities. Since April 2018 there have been 4 vulnerabilities published made public. There will be no security updates from Microsoft to fix these issues.
It is estimated that 170 Million computers are still running Windows XP.