Greetings,
"Computer" is PC or MAC?
What OS version and build? Upgraded recently?
Connected to what? USB port, hub. Cable type? Worked previously, never worked?
What program or application are you using?
More detail / information is needed.
~Rick
Bay Area - CA
~R5 C (1.0.2.1) ~RF Trinity, ~RF 100~400, ~RF 100~500, +RF 1.4x TC, +Canon Control Ring
~6D2 (v1.1.1) Retiring
~EF Trinity, others ~DxO PhotoLab Elite ~Windows10/11 Pro ~EVGA RTX 3080Ti FTW3 Ultra ~ImageClass MF644Cdw ~Pixel6
~CarePaks Are Worth It
