Customers receive up to £350 off a range of over 10 laptops. Some are offered free upfront, others at a heavily discounted cost.
However, buyers must pay £35 a month for 18 months on the 3 tariff to take advantage of the offers.
This works out at £630 over the contract period, which is a deal only for specialist users who do not have access to a fixed broadband connection.
"It is great for those customers who do not require, or have access to, a fixed landline telephone as the broadband is delivered via the mobile network," said Glenn Orchard, head of commercial development at PC World.
The tariff includes a 3GB monthly download allowance, with excess data charged at 10p per megabyte thereafter, and 200 free text messages sent via the laptop.
PC World launched a similar promotion last year in partnership with Orange.
Microsoft receives a 30 per cent cut of all purchases on the Xbox digital store
Credit card thieves used Apple ID accounts to buy and sell virtual currency for Clash of Clans and Clash Royale and Marvel Contest of Champions
$5.1bn fine further evidence that the EU is anti-US, claims Trump
New cable will connect Virginia to France