The Win32 and Win64 versions of USEARCH require a Windows
dynamic link library
(DLL) named vcomp100.dll. This is a mistake on my part -- I make a lot of effort
to ensure that USEARCH has no dependencies on external files because this is
inconvenient for the user and can lead to subtle compatibility problems and
crashes. Unfortunately, I overlooked this dependency, and there appears to be no
practical way to remove it.
The simplest fix is to download the DLL from the link
below and copy it into your Windows\System32 folder. If that doesn't work for
some reason, you could try using one of the official installers from Microsoft
(see links below). These install several other DLLs that you don't need, so I
recommend trying the simple fix first.
Download vcomp100.dll from drive5.com. Right-click on the link and use Save
As... to copy it to your System32 folder.