Longtime user of Webroot on Win10 (all required updates installed)., no other antivirus software installed. On Nov. 26, a web site popup warned “Computer Infected by Virus”. Shutdown, rebooted, and ran Webroot Secure Anywhere CE 21.4., version 9.0.31.84. No infections found. Rebooted in Safe Mode. A momentary arrow showed, then stopped, and Webroot would not load & run; no error popups, or similar. Shutdown again, and repeated, with same result. I don’t see many viruses, but when I do, the above is my default procedures. My last infection was Jul. 27, 2019, and Webroot executed in Safe Mode then, as it did prior to that infection (probably less that 2-3 earlier times total).
What do I need to do to cause Webroot to execute in Safe Mode, Win10, and what caused it to stop?