Hi, I nave installed W7 on a Lenovo T61 where was installed also Windows Xp, so that I can have a dual boot option.
Everything works fine but the strange thing is that when I boot Windows Xp I can see my Windows 7 partition but when I boot W7 there's no Windows Xp partition!
Choose Start–>Control Panel to open Control Panel.
Click the System Maintenance link, and then click Administrative Tools to open the Administrative tools folder.
Click Computer Management to open the Computer Management window.
In the Computer Management pane, expand Storage, and then click Disk Management.
...and assign a drive letter to the XP partition. But, TBH, it would be better to have the OSes on separate partitions that were invisible to the other OS and put and shared data on a third partition shared between them.
If you create a dual boot system with Windows7 and Windows XP it is important to make the Windows 7 partition invisible to the Windows XP system as otherwise Windows XP will delete all of the Windows 7 restore points every time it is used.