About this tag
File signing is a security mechanism that verifies the authenticity and integrity of software files. On Windows, digitally signed files have been tested by Microsoft's Windows Hardware Quality Labs (WHQL). The tag covers issues where unsigned files, such as prl_umdd.dll in Parallels for Mac, trigger warnings in applications like Windows Movie Maker. Users may need to obtain WHQL-signed versions from hardware vendors to resolve compatibility and trust problems.
  1. J

    Windows 7 Problem using Movie Maker under Parallels on my iMAC

    Hello, I run Windows 7 on my iMAC via Parallells without any problems normally. It works e.g. fine to run the Windows Office programs. But I run into problems when I try to run Windows Movie Maker. I get the instruction to run dxdiag.exe to verify my DDI-version. And then I get the following...
    • JDD
    • Thread
    • compatibility ddi-version digital signature dxdiag error file signing graphics driver imac mac users movie maker parallels prl_umdd.dll programs software issues support troubleshooting user experience virtualization whql windows 7
    • Replies: 1
    • Forum: Windows Software