Sales of some Microsoft software is set to give the NSPCC's Child's Voice Appeal an extra fund-raising push.

From today until the New Year, 15% of Microsoft Windows Vista or Office 2007 sales purchased through the Microsoft Store will be automatically donated to the NSPCC appeal.

The money is hoped to increase the number of calls that can be answered by ChildLine and the NSPCC Helpline.

Tim Hunter, Deputy Director of Fundraising at the NSPCC, said: “When a vulnerable child is in distress, the call an adult makes to the NSPCC Helpline could be a significant point in the child’s life".

"Tragically – we can not deal with every call just because of lack of funds. Even more unfortunately, a child may gain the courage to call ChildLine, only to not be able to get through".

"The money from this Christmas initiative will go towards our Child’s Voice Appeal which aims to let no child’s voice go unheard and to allow us to respond fully to every cry for help”.

Microsoft has been working with the NSPCC for 14 years now.