How Windows 7 virtual machines share host files

Q: My computer is Windows 7 Ultimate. I use the virtual machine software of Microsoft Virtual PC. How do I let the virtual machine share the files of the host?
A: After starting the virtual machine, click “Tools→Insert Integration Disk”, then uninstall the old Integration tool in the virtual machine and install the new software in the virtual machine drive.
Note: After the integration feature is started, a dialog box will pop up when the virtual machine starts to let you enter the user name and password information for login in the virtual machine. This step should be carefully filled in. If something goes wrong, you will enter The Windows login interface of the virtual machine, where the user name and password are entered here, the integration feature cannot be enabled. In other words, if you click on the integration feature to let the virtual machine share one of your hard disk partitions, and you do not enter the username and password when the virtual machine is started, just enter the Windows login interface in the virtual machine. Unable to see the hard drive partition of the host.