The original ISO for Microsoft System Center 2012 Configuration Manager SP1 contained a nasty little bug that prevented the ConfigMgr client from installing.
The problem was that the authenticode signature for MicrosoftPolicyPlatformSetup.msi, a required component of the client agent, was expired.
I discovered a few others had experienced the same thing (Client push fails with Authenticode Signature error).
Thankfully Microsoft only wasted about 2 weeks fixing the problem. You can read additional details about the situation at myITforum, the official KB article, and Windows-Noob. If you downloaded the original ISO, trash it and download the updated one.
Below is a table of the original ISO and the updated ISO from http://www.microsoft.com/licensing/servicecenter per my experience.
| Edition | RTM |
| Description | ISO of Original release of SCCM 2012 with SP1 integrated |
| Released | ~ 2013/01/01 |
| File Name | SW_DVD5_Sys_Ctr_2012w_SP1_Config_Mgr_EndPt_Protection_MultiLang_-2_X18-84756.ISO |
| File Size | 948,314,112 |
| MD5 Hash | 53e35591d07de3add537de11056afdc2 |
| CRC32 | 73c129a0 |
| SHA1 | ab930f8fc127d00c510a5fd73038cf16dcfd2290 |
| SHA-256 | deda950a915d6a3548722f55ca51af3139bd9c69307b25088777f53908d27255 |
| SHA-384 | 966842e033d56de87c5b5195d0fac75d3da8e53ec1f689fc1ab3d1e552b7ad6f21e86ddadfbc399c058ade725b143718 |
| SHA-512 | ab28694d0495d49620de70d287db972831f2903d1061b20d2324ef603ead56f19a8d019a52abc037bf448970ec53c63bd05013caf2454a5b9ad5889af6042b34 |
| Edition | CU0 / Refresh 1 / Cumulative Update 0 / ~whatever~ |
| Description | ISO of Refresh release of SCCM 2012 with SP1 integrated which contains KB2801987 |
| Released | ~ 2013/01/15 |
| File Name | SW_DVD5_SysCtr_2012_w_SP1_Conf_Mgr_and_EndPt_Prot_for_Windows-MultiLang_X18-58783.ISO |
| File Size | 948,322,304 |
| MD5 Hash | 069c24f62a51b7296d54c1529808d64e |
| CRC32 | 06a2806c |
| SHA1 | 877c0b77607e7a580683d8b05d8da7dc548f3bb3 |
| SHA-256 | f7b1b5932e7fcd8f32cd1632c0a7a0c55334b9d0600a7a12d40ad8454e907a12 |
| SHA-384 | ba59c36e4c4e829dc8168e15ca9489867f1b05ddf4a12cefcf77072e99db0df1e76586af07a52d49a71957ab11b4b374 |
| SHA-512 | c71f29244ae84d14721e71ec7294e1450d11e7e1dfbedd284e5f82999176e0260252e5dac6219aae03f8c456c008b8b0655fd2a22d2ffc44a60c628a1d879f86 |