如何解决更新证书、或者创建SSL证书的时候显示“无法生成证书请求，拒绝访问”等提示信息

直觉告诉我应该是权限问题，搜索了一下，微软网站找到答案

RESOLUTION

To resolve this issue, grant the administrator account Full Control on all files and subfolders in the MachineKeys folder. To do this, follow these steps:

Click Start, click Run, type "\Documents and Settings\All
Users\Application Data\Microsoft\Crypto\RSA\", and then click OK.
Right-click MachineKeys, and then click Properties.
On the Security tab, click Administrator or click the administrator group account you want, click
to select the check box to enable Full Control permissions, and then click OK.

C:\Documents
and Settings\All Users\Application Data\Microsoft\Crypto\RSA\MachineKeys

就吧这个文件夹的权限设置Administrator（如果你登陆的用户是其他，请填写这个用户名）完全控制即可