You have installed itunes10.5 on your computer recently. However, if you install itunes10.5 halfway through the computer, the installation of Microsoft. vc80.crt... Assembly fails. Solution:
In fact, you only need to start Windows module installer. Start mode: (win7): Right-click my computer-Manage-services and applicationsProgram-- Service -- Windows module installer -- Right-click to start.
If there is a prompt of insufficient resources (skip this section if not), it is because some software installed previously limited the Registry size. The solution is to enter Regedit in the Start window to enter the registry. Locate HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control. Note that when the control is selected, select registrysizelimit (REG_DWORD type) on the Right and change its value
Ffffffff (4294967295 in decimal format) restarts the computer and starts Windows module installer.
If you have installed the previous version of iTunes, make sure that all the itune startup items are enabled before the restart.
In this way, the installation is complete.