The error is a common headache for Windows 10 64-bit users, typically occurring when installing large games or software. While you can download the file directly from sites like DLL-files.com , the error usually points to underlying system issues rather than just a missing file.
You can download the file from a trusted DLL archive. Here is a safe source: download isdonedll 64 bit windows 10 upd
isdonedll.org or similar – fake DLL repository (serves Trojan:Win32/Wacatac)drive.google.com – often password-protected archives containing batch scripts that download further malware