I had the same problem as you when, without my knowledge, Snapdo was installed and it was messing up my system. I tried many anti-malware applications and none of them helped.
Please download Combofix and let it scan your system. If it's possible, rename the saved packages as something else rather than combofix.exe. Launch the program then sit back and let it scan. The computer will restart and everything related to Snapdo will be removed.