Even a year after Microsoft stopped supporting the OS, lots of East Europeans still have the system installed on their PCs.
The security company, Bitdefender, reported that Ukraine tops the list, with 41.2 per cent XP users, closely followed by Hungary and Romania; the Czech Republic is at the bottom of the list with 4.7 per cent.
Analysts believe companies are using Windows XP because of legal or compatibility issues, shying the costs of an upgrade.
With no more security updates or technical support, the operating system is a security risk, making it easy for hackers to infiltrate the affected computers. Analysts are confident the number of XP users will diminish gradually in coming years.