adobe pop up and windows flashing

I have windows 8.1 (recently downloaded windows 10 but removed and went back to version 😎  About 2 days later, I keep getting a pop up when playing an online game says "about adobe flash player"  If I click it it takes me to the adobe page.. I have checked my version of adobe, it is correct... I have disabled active x and went to the manage add on's shockwave is there and enabled.  This pop up keeps appearing, as well as randomly freezing up screen  (like now it keeps stopping me from typing, the cursor freezes, then jumps backwards into middle of previous words, then box comes saying undo or select all)  Also randomly flipping screens, like just now flipped to my mail screen then explorer msn screen then to my app view screen...  something crazy is going on... if anyone has encountered this and can please help, it would be appreciated.