Stone Computers has announced the purchase of troubled laptop manufacture Rock Group for an unspecified sum.

Rock went into administration in May following "cash flow difficulties" as a result of "stock misappropriation by a former employee", according to the company .

The firm, which specialises in high performance laptops, will be merged with Stone shortly.

Dominic Wong, joint administrator for the two companies, said: "We are delighted that a sale of this award-winning laptop manufacturer has been secured, preserving employment for the staff.

"As well as ensuring the continued availability of Rock's high performance laptops, the Stone Group has committed to ensuring that existing Rock customers continue to receive warranty, repair and technical support services."

Stone is one of the biggest domestic computer manufacturers left in the UK, following the collapse of Evesham. It has a large hand in the educational computing market and also sells to government.