Removed McAfee Security package that came with Windows 10, but continue to have popup at startup "SafeKey could not write to your hard drive". Could Not Write To Directory: Error B: A C E3
Moved to Consumer > General Discussions.
Run the Consumer Product removal tool and reboot afterwards: http://us.mcafee.com/apps/supporttools/mcpr/mcpr.asp
Best contact Tecvhnical Support then, it's free by phone: Consumer Technical Support (alter Country @ top right as needed)
Have you tried searching your registry for safekey by name?
Press Windows key + R
Type in regedit and hit Enter pr OK...OK any prompts.
You'll get a window that looks like this, if it's expanded collapse all until none are expanded.
With Computer highlighted click Edit then Find and type in safekey and click Find next
Delete any it finds. Click F3 to find the next after that and so on.
It takes quite a while to do but maybe worth a try.
Other than that, all I can suggest is call Tech Support back and ask for an escalation.
The actions you suggested were tried numerous times. Using a registry keyword search for "SafeKey" and for "McAfee" will yield several items that can be deleted but each will regenerate upon restart. This was a new Dell PC package that included McAfee. McAfee was deleted but the error popup remains (possibly an attempt to offer an McAfee upgrade but the destination files have been deleted). As I chose not to use McAfee on this PC, all McAfee files and folders have been deleted. I appreciate your help.
Although Ex_Brit has been very helpful, the 'Correct Answer' has not been found on this forum or by the McAfee technical group. But I will keep your instructions in mind if a solution is found..