This arrangement can be established through the Device Manager's Disable in This Hardware Profile option. This setting will keep the driver from loading up until it is reactivated, and is located in the Properties window for that particular device.

Sessions are more secure and fast because they are stored at server side. But Sessions has to be used combined with Cookies or URLReWriting for mainting the client id that is sessionid at client side. Cookies are stored at client side so some clients may disable cookies so we may not sure that the cookies which we are mainting may work or not but in sessions cookies are disable we can maintain
our sessionid using URLReWriting. In URLReWriting we can't maintain large data because it leads to network traffic and access may be become slow. Where as in sessions will not maintain the data which we have to maintain instead
we will maintain only the session id.

The Drive A: option in the Drive Seek Sequence setting should be enabled if the system cannot boot to the hard disk drive and you have a clean boot or emergency repair floppy. If you disable the A: seek function in the CMOS setup utility (by not selecting it as part of the book seek sequence), you would not be able to use the A: drive to troubleshoot hard drive problems. The system would never access the floppy drive to see if it had a bootable disk in it. However, you can always enter the CMOS Setup utility and include it as part of the troubleshooting process.

To install a non-PnP device on a specific COM port (that is, COM2), you must first disable that port in the system's CMOS settings in order to avoid a device conflict. If not, the system might try to allocate that resource to some other device, since it has no way of knowing that the non-PnP device requires it.

When installing a non-PnP modem, set the modem's configuration jumpers to operate the modem as COM2, and then disable the COM2 port in the CMOS utility.

In the case of the internal modem, the UART in the modem normally replaces one of the two COM port UARTs provided by a typical PC system. If the COM port UART is not disabled, the system might have trouble differentiating between the two ports and a conflict can develop. Therefore, it is common practice to disable an onboard UART when an internal modem is installed. The COM ports can be enabled or disabled through the system's CMOS Setup- Peripherals screen.