SAN FRANCISCO - Laptop computers using Googles Chrome operating system will go on sale in June, as the worlds No. 1 Internet search engine challenges Microsoft Corp and Apple on their home turf. The new Web-centric PCs, made by Samsung and Acer Inc, are Googles latest attempt to change how consumers and companies use their computers. The bare-bones operating system is essentially a web browser that steers users to use applications like email and spreadsheets directly on the web, instead of storing software such as Outlook or Word directly on PCs. The complexity of managing your computer is torturing users, Google cofounder Sergey Brin told reporters. Its a flawed model fundamentally. Chromebooks are a new model that doesnt put the burden of managing your computer on yourself. Agencies For nearly two years Google has touted Chrome as an alternative to Microsoft Windows.