Today I noticed that the default search engine for Chrome which was set to Google was switched by something to Bing screwing up my Chrome tab shortcuts, colors, and almost everything. I did an AI search and it said it most likely was Malware and to run an Antivirus program to search for malware. I ran my Bitdefender Total Security scan and it found nothing. What would make a search engine switch like that if not malware? Could it be malware that Bitdefender just didn't detect?