The agency won the account following an eight-way competitive pitch and will manage the brand's comms in the UK.
Chocolate has been charged with raising the brand's awareness in a more consumer-focused market along with maintaining its coverage within the tech sector.
Chocolate Communications founder, Jill Coomber, said: 'We are really excited about the opportunity to work with PC Tools. Their approach is different to other internet security companies out there. This campaign gives us the opportunity to innovate outside of the sector norm and create something truly stand-out in the market.'