枚举CSP时，GetLastError（）为0x90080020，枚举不到电脑里的csp，应该怎么解决？
枚举CSP函数CryptEnumProviders返回的错误码
系统是不是被精简过了？缺少Microsoft Base Cryptographic Provider
http://blog.csdn.net/liuhuiyi/article/details/7788975
Microsoft Cryptography API may not work if the default CSP has been set incorrectly
https://support.microsoft.com/en-us/kb/313494