Smart App Control
On clean installs this can block unsigned tools. Know whether it is in enforcement before you assume the ZIP is corrupt.
Home / Windows 11
OS notes
64-bit Windows 11 is a primary target. After a feature update, re-check exclusions and re-extract if Defender ate a DLL. Home vs Pro does not change the attach model.
On clean installs this can block unsigned tools. Know whether it is in enforcement before you assume the ZIP is corrupt.
More info → run anyway is common for unsigned desktop utilities. Still verify you used this site.
If attach flakes, disable extra overlays one at a time. They fight for the same process space.
Older OS: Windows 10 page.