I want to download pc cam driver which has no label



Hello and welcome to Tom's Hardware Forums.

In Control Panel>System>Hardware>Device Manager, right click the item with the yellow mark and then click the Details tab. Under HardwareIDs, note down the four characters which follow VEN for Vendor and the four after DEV for Device and input those details in the boxes at http://www.pcidatabase.com. You might then be lucky and follow the links to the right driver.

Unfortunately, a lot of cheaper cameras show up only as Single Chip Device and I've often struggled to find drivers for those,.