The Game computer store in Bolton was badly damaged last week by a fire in offices above it owned by Barclays Bank.
Game occupied much of the ground floor of the block, and stock was wrecked by smoke and water used to put out the blaze. Surrounding stores were also damaged.
The blaze started around midnight on 24 January and fire fighters called to the scene found a man hanging from a window. Firemen were forced to smash down computer-coded doors to rescue him, after failing to persuade the man to climb down the ladder.
The 20-year-old, believed to be an intruder, was arrested and taken to hospital, where detectives are waiting to interview him.
Sixty firemen tackled the fire, which took more than 12 hours to put out.
Infrastructure provider says international sales now make up 51 per cent of its revenue
Suzanne Chappell of TMS plans sailing venture after selling Oxfordshire-based TMS to acquisitive Chess
Withdrawal of credit insurance by some providers a 'reflection' of current challenge facing IT sector, according to MD Steve Soper
SMART's UK managing director joins Lenovo to boost SMB business