Browsing internet, page turns blank, search bar says 'Redirect..'

I'm browsing the internet just like any ordinary person, when the screen goes completely white, and the search bar up top says

'symres:C:\Program Files (x86)\Norton Internet Security\MUI\22.5.2.15\09\01\coUICtlr.loc/SUSPICIOUSREDIRECT.HTML'

SUSPICIOUSREDIRECT.HTML??

what does that mean?

I was in an online forum when this happened. wasn't downloading anything, wasn't uploading. randomly occurred.

Thanks so much.