Should I block it?
No, this file is 100% safe to run.
 
 Additional versions
Additional versions
(Note, AT&T Services publishes each variation of this file with the same version, but the hashes are unique.)
 
Relationships
     
    
        System.dll
By AT&T Services (Signed)
| MD5: | 8e667316359f46c8e1ff1f6ef5aa957f | 
| SHA1: | 1c2e20691617078c472d0fac1ad947652393c548 | 
Overview
System.dll is loaded as dynamic link library that runs in the context of a process. The file is digitally signed by AT&T Services which was issued by the VeriSign certificate authority (CA).
 Details
Details
| File name: | System.dll | 
| Typical file path: | C:\Documents and Settings\user\Local Settings\Temp\nsj2DD.tmp\System.dll | 
| Size: | 1.88 MB (1,966,080 bytes) | 
| Certificate | 
| Issued to: | AT&T Services | 
| Authority (CA): | VeriSign | 
| Expiration date: | Saturday, September 7, 2013 | 
| Digital DNA | 
| PE subsystem: | Windows GUI | 
| File packed: | No | 
| Code language: | Microsoft Visual C++ 10.0 | 
| .NET CLR: | No | 
More details
 Distribution by Windows OS
Distribution by Windows OS
| OS version | distribution | 
| Microsoft Windows XP | 37.50% |  | 
| Windows 7 Ultimate N | 17.50% |  | 
| Windows 7 Ultimate | 12.50% |  | 
| Windows 7 Home Premium | 7.50% |  | 
| Windows 7 Professional | 7.50% |  | 
| Windows 7 Starter | 5.00% |  | 
| Windows Vista Home Basic | 2.50% |  | 
| Windows Developer Preview | 2.50% |  | 
| Windows 8 Pro | 2.50% |  | 
| Windows 8 Pro with Media Center | 2.50% |  | 
| Windows Vista Home Premium | 2.50% |  | 
 Distribution by country
Distribution by country
United States installs about 52.78% of System.dll.
 Distribution by PC manufacturer
Distribution by PC manufacturer
| PC Manufacturer | distribution | 
| Hewlett-Packard | 24.00% |  | 
| Acer | 20.00% |  | 
| Intel | 16.00% |  | 
| Dell | 16.00% |  | 
| Lenovo | 8.00% |  | 
| Compaq | 8.00% |  | 
| Sony | 8.00% |  |