This DLL accesses data pipe information for various connectivity protocols, such as HTTP.
See below for some troubleshooting steps you could take to fix wininet.dll not found or missing errors.
There are manyreasons why downloading a DLL file like that is a bad idea.

Restore wininet.dll from the Recycle Bin.
The easiest possible cause of a “missing” file is that you’ve mistakenly deleted it.
Run a virus/malware scan of your entire system.
Use System Restore to undo recent system changes.
Reinstall the programthat uses the wininet.dll file.
If the error happens when you use a particular program, reinstalling the program should replace the file.
Try your best to complete this step, as it’s a likely solution to this DLL error.
Update the drivers for hardware devicesthat might be related to wininet.dll.
The wininet.dll file may or may not be related to video cardsthis was just an example.
The key here is to pay very close attention to the context of the error and troubleshoot accordingly.
execute the sfc /scannow System File Checker commandto replace a missing or corrupt copy of the wininet.dll file.
If this DLL file is provided by Microsoft, theSystem File Checkertool should restore it.
Install any available Windows updates.
Manyservice packsand other patches replace or update some of the hundreds of Microsoft distributed DLL files on your machine.
The wininet.dll file could be included in one of those updates.
Test your memoryand thentest your hard drive.
Repair your installation of Windows.
Use a freeregistry cleanerto repair wininet.dll related issues in the registry.
We rarely recommend the use of registry cleaners.
Perform a clean installation of Windows.
This will erase everything from the hard drive and install a fresh copy of Windows.
If none of the steps above correct the wininet.dll error, this should be your next course of action.
All the information on your hard drive will be erased during a clean install.
Troubleshoot for a hardware problemif any wininet.dll errors persist.
After a clean install of Windows, your DLL problem can only be hardware related.
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In some cases, these errors could indicate aregistryproblem, a virus or malware issue, or even ahardwarefailure.
There are several ways wininet.dll errors can show up on your setup.
The context of the error is an important piece of information that will be helpful while solving the problem.