Should I block it?
No, this file is 100% safe to run.
 
     
    
        nvwddi.dll
NVIDIA nView Display Driver Interface Lib, Version 305.93 by NVIDIA
| Version: | 6.14.13.0593 | 
| MD5: | 746553670e55fbadd1d8fa6e7b5e9156 | 
| SHA1: | 4b916362df992ec9f6ce8985d9213f352426afcf | 
Overview
nvwddi.dll is loaded as dynamic link library that runs in the context of a process. This particular version is usually found on Microsoft Windows XP (5.1.2600.196608).
 Details
Details
| File name: | nvwddi.dll | 
| Publisher: | NVIDIA Corporation | 
| Product name: | NVIDIA nView Display Driver Interface Lib, Version 305.93 | 
| Typical file path: | C:\Windows\System32\nvwddi.dll | 
| File version: | 6.14.13.0593 | 
| Size: | 53 KB (54,272 bytes) | 
| Digital DNA | 
| PE subsystem: | Windows GUI | 
| File packed: | No | 
| .NET CLR: | No | 
More details
 Distribution by Windows OS
Distribution by Windows OS
| OS version | distribution | 
| Microsoft Windows XP | 100.00% |  | 
 Distribution by PC manufacturer
Distribution by PC manufacturer
| PC Manufacturer | distribution | 
| Dell | 100.00% |  |