DLL files are very useful partin every versions of Microsoft Windows. However, they can sometimes be quite a pain. If DLL files get damgaed or get deleted, one must find a new copy of the DLL and re-install it. This, unlike installing other programs/software, requires registering it within the registry, which may seem like a daunting task.
How To Download unimdmat.dll
1 Go to the free DLL download website (see link in the Resources) and click "Download unimdmat.dll."
2 Click "Save" in the confirmation pop-up, navigate to the location on your hard drive where you want to save the file and click "Save" to begin the download.
3 Right-click the saved DLL file and select "Copy." Go to the "Start" menu, click "Computer" or "My Computer," double-click the "C:" drive, double-click the "Windows" folder and then the "System32" folder. Right-click anywhere in a blank space and select "Paste."

4 Go to the "Start" menu, type "run" in the "Start Search" box and hit "Enter." (Windows XP users: Go to the "Start" menu and click "Run.") Type the following command in the search field and hit "Enter" to register the DLL:
Regsvr32 "C:\Windows\System32\unimdmat.dll"
Click "Yes" in the pop-up to confirm the registration.
5 Restart your computer.
But, we did not recommend that you download a dll file from a unknown website for it is very dangerous. A free download can contain ads, malware, virus etc. Now we need to find a professional software which can help you download dll file and register it. Like SmartPCFixer. It is a professional dll error fix tool which can help you install and register dll in 3 steps.
Know more detail: Dll Error Fix
Fix unimdmat.dll with SmartPCFixer automatically
Step1, Download and install SmartPCFixer, Launch it.
Step2, Find "System Fix" on the left side meau.
Step3, Enter "Dll Download" Option. Insert your deleted or corrupted dll file name. Click "Download" button.
Step3, Enter "Dll Download" Option. Insert your lost or corrupted dll file name. Click "Download" button.
If it did not work, Please runs a free scan on your computer here: Free Scan
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