SINGAPORE - More than a third of eligible Windows devices in Singapore have less than three days to upgrade to the Windows 10 operating systems for free, tech giant Microsoft said on Tuesday (July 26).

According to web traffic analysis tool StatCounter, 36.3 per cent of PCs in Singapore are still running on Windows 7 or Windows 8.1, both of which are eligible for the free Windows 10 upgrade offer until Friday (July 29).

Ms Veronica Chiu, Windows Business Group Lead, Microsoft Singapore, said in the press statement: "While many consumers in Singapore are still on older versions of Windows, we strongly encourage eligible PC users to take advantage of the free upgrade to enjoy great new features on Windows 10 that will truly enhance their personal computing experience."

Ms Chiu noted that more than 350 million active devices around the world run on Windows 10.

The upcoming Windows 10 Anniversary Update, which will roll out globally on Aug 2 to Windows 10 users, includes new security features for enterprise customers, increased power efficiency and an improved gaming experience.

From Friday, users who missed the free upgrade offer will have to purchase a new Windows 10 product licence, priced at $162 at the Windows online store, to keep their devices up to speed with the Anniversary Update.

For more information, head to https://www.microsoft.com/windows/windows-10-upgrade.