Msstdfmt.dll errors are caused by situations that lead to the deletion or corruption of the msstdfmt DLL file. In some cases, msstdfmt.dll errors can indicate a registry problem, a virus or malware issue, or even a hardware failure.
How to Fix 'msstdfmt.dll' Error in Windows 10/8/7 [Tutorial]
Follow these steps in the order they are presented below to try the most likely solutions first.
Recover the file from the Recycle Bin. The simplest possible cause of a "missing" msstdfmt.dll file is that you accidentally deleted it.
If you suspect this, but you've already emptied the Recycle Bin, you may be able to recover the files with a free file recovery program.
