Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
1) Install a firewall ( you should have one anyways ). Turn off messenger service. Install firefox ( strictly speaking, not what you asked. But with this combo, I haven't had a pop up in forever. I've never had a messenger pop up ).
1.) covered by XOR != OR
2.) RealOne sucks, ditch it. If you still insist on keeping that crap on your comp, I think there's an options menu that lets you pick what filetypes are associated with it.
3.) You mean the DivX codec? None. Use Xvid, works with Divx encoded files.