Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item.
后来查到微软的以下解决方法：
Method 1: Add the UNC path of the network location to the Trusted sites zone of Windows Internet Explorer 7
To add the UNC path of a network location to the Trusted sites zone, follow these steps: 1. Close all active Windows Internet Explorer 7 windows.
2. Start Windows Internet Explorer 7.
3. On the Tools menu, click Internet Options.
4. In the Internet Options dialog box, click the Security tab.
5. On the Security tab, under Select a zone to view or change security settings, click Trusted sites, and then click Sites.
6. In the Add this website to the zone box, type the UNC path of the network location, and then click Add. For example, type \\Server\Share.
Note In this example, Server represents the NetBIOS name of the server. Share represents the shared folder where the file is located.
7. Click Close, and then click OK to close the Internet Options dialog box.
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Method 2: Disable the Internet Explorer Enhanced Security Configuration setting
To disable the Internet Explorer Enhanced Security Configuration setting, follow these steps:1. Click Start, click Run, type appwiz.cpl, and then click OK.
2. In the Add or Remove Programs dialog box, click Add/Remove Windows Components, click Internet Explorer Enhanced Security Configuration, and then click Details.
3. In the Internet Explorer Enhanced Security Configuration dialog box, click to clear the For administrator groups check box and the For all other user groups options check box, and then click OK.
4. Click Next to disable the Internet Explorer Enhanced Security Configuration setting.
我使用了第二种方法，解决了问题。