While originally packaged as a standalone .diagcab file, this tool has largely been superseded by modern diagnostic suites like the Microsoft Support and Recovery Assistant (SaRA). When to Use the Tool
If the o15-ctrremove tool cannot finish the job, you may need to manually delete residual registry keys: Press Win + R , type regedit , and hit Enter. 015ctrremove
If the contrast removal fails or the ctrremove function errors out: While originally packaged as a standalone
: This specific tool is primarily for Office 2013 (v15). For newer versions (Office 2016, 2019, 2021, or Microsoft 365), Microsoft now recommends using the Microsoft Support and Recovery Assistant (SaRA) . 2. Downloading and Running the Tool For newer versions (Office 2016, 2019, 2021, or
Locate the file (it will end in .diagcab or sometimes start with MicrosoftFixit ). Double-click to run it. Select when prompted.
(often called Iodine Removal or Virtual Non-Contrast generation) use spectral data or advanced post-processing to mathematically subtract the iodine from a contrast-enhanced image.