Verie

did you download the full client with the blizzard app or only ran the ptr exes?

freakz doesn't even have "soon" they have 1 patch for the next 2/3 years

updated 1 month ago, which is the reason why 7.1.5 still works on windows xp

https://eu.battle.net/support/en/article/76459 doesnt support xp anymore i guess

you will have to code the 7.3.5 client by yourself