解答我以前也是一样的问题，后来问了computer center得到的答案是： 1. Click Start , point to Settings , and then click Network and Dial-up Connections . 2. Right-click the appropriate dial-up networking connection, and then click Properties . 3. Click the Networking tab, and then click Settings . 4. Click to clear the Negotiate multi-link for single link connections check box (if it is selected). 5. Click OK , and then click OK . 6. Double-click the connection, and then click Dial . o If this procedure resolves the issue and you can establish a dial-up connection, you do not have to follow the remaining steps in this article. o If this does not resolve the issue and you cannot establish a dial-up connection, go to step 7 to continue to troubleshoot this issue. 7. Right-click the connection, and then click Properties . 8. Click the Security tab. 9. Under Security options , click Allow unsecured password in the Validate my identity as follows box, and then click OK . 10. Double-click the connection, an (more...)