Microsoft will be feeling the pressure today.
Formerly the world's biggest technology company, this afternoon sees the official launch of Windows 8 - and it is touting it as its biggest since it released Windows 95 over 17 years ago.
Tami Reller, Windows Chief Financial Officer and Chief Marketing Officer, told ITV News that despite the pressure she's confident the product will succeed:
And it is the choice that Microsoft is hoping to capitalise on.
While Apple's software is limited to its own devices, Windows 8 can run on multiple devices made by multiple manufacturers.
The coming weeks will see a slew of new products running Windows 8 hit the shelves in the run up to Christmas from the likes of Samsung, Sony, HP, Lenovo and ASUS.
Jamie Harvey, Commercial Director for ASUS UK, told ITV News why his company is releasing several new products that run Windows 8:
He added why he's hoping the launch will contribute to ASUS sales:
Microsoft also hope to regain market share by launching its first ever tablet - the Microsoft Surface - designed especially to take on the likes of the iPad.
But where Windows will struggle to compete with Apple's offering, at least at first, is in the apps it runs.
Tami Reller insists that Microsoft is working hard to add to its offering:
She insists that Microsoft will ensure seamless integration between devices too:
The company has fallen behind in the last few years as Apple took the lead with the iPad. In 2010, Apple overtook Microsoft's revenues for the first time.
Analysts say it is crucial that Microsoft does well with this launch. Without success, it will leave it trailing behind its rivals.
Even Microsoft patriarch Bill Gates knows how important it is for the company:
Windows 8 goes on sale in the UK at midnight on Friday.