pop ups

hey folks. sorry i couldn't find anything on pop ups about. so yesterday my phone is fine. i only did 1 thing last night before bed. i removed an account from my gmail since i had it setup under my htc mail app. this morning i get up and get my phone going. as soon as i open something, bam, an almost full screen pop up with an orange border and large x in the upper right corner. naturally im not 🤔 thinking about it and just close it. for hours now the pop up keeps coming back. randomly during opening apps or typing this out. i ran antivirus, malware, tried uninstalling a couple things it could of been. seems that clean master is uninstalled but there is a com. cmguard something still in memory. touchpal keyboard had a similar thing before but added an option to disable in an update. now i cant figure out what is causing this. any help is appreciated.

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