I have no idea, but it is added as an exception to Windows firewall and gave administrator privilegies.
No, I am not, but it is unmodded 1.0 version without any cracked file AFAIK.
All the mods, like MTA, SA:MP. Works best with a legit copy of Grand Theft Auto, its the same thing with Gta IV, Gta V aswell.
+Buying GTA : SA today would probably be around 10 - 20 dollars. I can't imagine it being higher than that.
Its worth it, MTA is an amazing experience after all. Get a legit copy to enjoy it to the fullest.
If you're still hesitant and want to try something i can give you some simple suggestions.
A - Run As Administrator.
B - Re-install MTA and GTA:SA
C - Check your firewall, try installing a different anti-virus.
D - Repair your GTA : SA directory.