Recently, I have been having a random issue with a certificate problem browsing our site. I suspect it has something to do with an advertiser, but cannot be certain. When this pops up, I have to open task mgr and kill the IE11 process.
This may be a side effect of a recently imposed security policy at work. I haven't noticed any problems from my home workstation. I'll keep working with it. I cannot install Edge on my machine, but I can install Chrome.