Disabled ribbon items or missing options in Central Administration

I was encountered a familiar error while installing a Sharepoint 2013 environment. All of the ribbon items in central administration site was disabled. Furthermore some of the important options such as “manage services in the server”, “farm configuration wizard” were missing. I run IE as administrator (or run with the administrator account). Missing options came back but ribbon items were still disabled.
After spending a few hours to find the cause of this problem, I realized that my system time is out of date. First of all I fixed the time of the DC server from where my SP server is syncing its time. Then I manually resynced SP servers time by running “w32tm /resync” command.
To tell the truth I wasn’t expected that it was a system date issue. I hope you find this post before spending hours like me 🙂