The campaign will aim to boost the title's circulation by highlighting the cost benefits of subscribing through six-page A4 brochure mailer, which will be sent to 7,500 subscribers across the Which? portfolio of titles.
The mailer will also highlight a series of incentive-based offers, including free computing guides, a voucher-based free trial, and a competition to win a Which? Best Buy car or £20,000.
Computing Which?, published by Which?, said the campaign is a "departure from its usual campaign strategy", which usually focuses on large cash prize giveaways. Which? intends to include its other titles as part of its future campaigns.
Zoe Richards, account director at Loewy, said: "Computing Which? has a reputation as the most reliable source of impartial advice and information available.
"Our mailer has endeavoured to communicate this authority clearly and boldly and to demonstrate the magazine's status as an indispensable source of support for anyone who uses a computer."
Katherine Johnson, marketing manager at Which? added: "Independence, passion, energy and rigour characterise our approach accompanied by a commitment to making things better for consumers.
"Loewy has placed these characteristics at the heart of its campaign, while identifying and engaging with the everyday frustrations experienced by most computer users."
Loewy's roster of clients includes Eurostar, NSPCC, Shell, Nestle, Pfizer and Oxford University.
If you have an opinion on this or any other issue raised on Brand Republic, join the debate in the .