Consider the following scenario:

• On a ThinkPad X300 computer that is running Windows Vista, you enable the Disable optical drive option on the Power Management tab.
• You leave the system idle for more than 10 minutes, and the optical disk drive turns off.
• You perform a suspend-and-resume cycle or a hibernate-and-wake cycle on the computer.

In this scenario, the computer’s optical disk drive is intermittently not displayed in My Computer or in Device Manager.

On a Lenovo Thinkpad that runs Windows Vista, you find that the disk space is used up after a period of time.

Consider the following scenario:

• On a ThinkPad X300 computer that is running Windows Vista, you enable the Disable optical drive option on the Power Management tab.
• You perform a suspend-and-resume cycle or a hibernate-and-wake cycle on the computer.

In this scenario, the computer’s optical disk drive is intermittently not displayed in My Computer or in Device Manager.

In Windows Vista, an Ultra DMA Mode 5 device may perform only at the speed of an Ultra DMA Mode 2 device after you swap devices.

This problem occurs on an IBM ThinkPad mobile PC or on a Lenovo ThinkPad mobile PC if the following conditions are true:

• You start the computer with an Ultra DMA Mode 2 device in the Ultrabay swappable drive bay. For example, you start the computer with an optical drive in the drive bay.
• You eject the Ultra DMA Mode 2 device from the drive bay and insert an Ultra DMA Mode 5 device in the drive bay. For example, you insert a hard disk drive in the drive bay.

When these conditions are true, the transfer mode stays at the slower Ultra DMA Mode 2 speed. The system does not correctly use the faster Ultra DMA Mode 5 speed.

You try to upgrade the system BIOS by using the ThinkPad BIOS update utility on a Windows Vista-based Lenovo Thinkpad T60 portable computer or on a Windows Vista-based Lenovo Thinkpad T60p portable computer. However, the ThinkPad BIOS update utility stops responding.