The phrase is a common cry for help from Windows users dealing with "Application Error" pop-ups. While the filename sounds like alphabet soup, it actually stands for the Windows Update AutoUpdate Client .
wuauclt.exe crashes most often due to , mismatched system files (DLL hell), or conflicts with security software that hooks into the update process. The single most effective fix is resetting the Windows Update components. why does wuaucltexe crash best work