I just installed Windows 7 Ultimate x64 (version 6.1 build 7600). I cannot install any software related with msi. For example, if I install Office 2007, there will be a pop up message "Setup cannot find Office.en-us\OfficeMUI.msi" and the installation has to be cancelled. Other software installation has the same issue. All of them pop up a message "Setup cannot find XXXX\YYYYY.msi". Anybody can help me with this issue?