WASHINGTON (BBC): Microsoft has decided to continue providing virus warnings for the ageing Windows XP operating system until 2015. The warnings were due to end on 8 April 2014 when all other support for the software is scheduled to stop. However, the numbers still running the 12-year-old operating system convinced it to provide more help. About 30% of all desktop computers are still running XP, according to figures from research firm Net Applications.