Should I block it?
No, this file is 100% safe to run.
 
     
    
        nvShell.dll
NVIDIA Desktop Explorer, Version 141.00 by NVIDIA Corporation (Signed)
| Version: | 6.14.10.14100 | 
| MD5: | ab8488ab076ea44528a0f34e318c67e8 | 
| SHA1: | 43513284be45fbd2c83b117f7199f32aa84ee362 | 
Overview
nvshell.dll is loaded as dynamic link library that runs in the context of a process. The file is digitally signed by NVIDIA Corporation which was issued by the VeriSign certificate authority (CA). This particular version is usually found on Windows 8 Pro (6.2.9200.0).
 Details
Details
| File name: | nvshell.dll | 
| Publisher: | NVIDIA Corporation | 
| Product name: | NVIDIA Desktop Explorer, Version 141.00 | 
| Typical file path: | C:\Program Files\nvidia corporation\nview\nvshell.dll | 
| File version: | 6.14.10.14100 | 
| Size: | 694.78 KB (711,456 bytes) | 
| Build date: | 1/16/2014 4:00 AM | 
| Certificate | 
| Issued to: | NVIDIA Corporation | 
| Authority (CA): | VeriSign | 
| Effective date: | Thursday, September 1, 2011 | 
| Expiration date: | Monday, September 1, 2014 | 
| Digital DNA | 
| File packed: | No | 
| .NET CLR: | No | 
More details
 Behaviors
Behaviors
Context menu handler
Located in '*\shellex\ContextMenuHandlers'
 Distribution by Windows OS
Distribution by Windows OS
| OS version | distribution | 
| Windows 8 Pro | 100.00% |  | 
 Distribution by PC manufacturer
Distribution by PC manufacturer
| PC Manufacturer | distribution | 
| Lenovo | 100.00% |  |