The "Hi-Speed USB Host Controller" is the part of the computer that enables the use of USB 2.0. USB 2.0 offers a huge speed advantage over USB 1.0/1.1, upgrading transfer speed from 12 mbps to 480 mbps.
A USB host controller is a piece of hardware. It is usually incorporated into the southbridge in your motherboard. As such, it cannot be downloaded. If you want to upgrade a low-speed USB controller to a high speed controller you will have to buy a new high-speed controller. Changes are the old controller is not removeable and not upgradeable.
the device.
Host controllers can NOT be downloaded. A host controller for hardware is always going to be a peice of hardware. in your situation, you probably don't have a USB2.0 high speed port. You can always get a USB2.0 PCI adapter.
host controller
Typically it is a usb port 2.0.
127 USB devices are supported by one host controller.
Host controller
Yes. If you have an empty PCI bus slot on the PC motherboard, you an install a PCI card which provides you 2 or 4 USB2.0 ports which are available at around $10. There are some combo cards which provide both USB and Firewire (1394 ports). - Neeraj Sharma
You can download a driver for a hi-speed USB controller that is already installed. You cannot, however, download any software to make an older USB controller faster.
If you have Windows XP Service Pack 1 (SP1) then you can add USB 2.0 drivers to enable the USB host controller to operate at USB2.0 speeds. Windows XP Service Pack 1 is released with USB1.1 (slow) host controller device drivers. From SP2 and onwards USB2.0 is supported by default. See the related link for more info about why USB 2.0 operate at USB 1.1 (slow) speed.
If you're using older drivers you won't be able to use high speed. Check to see if there are newer drivers available for your USB ports.
Yes there is. Buslink makes a 4 port PCMCIA USB 2.0 Host controller, fo about $28. You can find one at http://www.mypcgoodies.com/details.asp?item=HM09101%2D1