My phone does not connect to my HP Founder laptop.
To make PC recognize the phone, you will have to install the necessary drivers. Luckily, these drivers are bundled with the Zune Application that you will have to download.
Download page: http://www.microsoft.com/en-us/mobile/support/product/lumia900/softwareupdate/
Disconnect the phone, install the application then connect the phone and Windows will recognize the device and install the necessary drivers.