A pesky problem about TS2-UC missing files (Solution found, look inside)

I don't quite understand you, but what am I seeing are:

1. You don't have Program Files (86x) folder- resolve: Check your Program Files (not the 86x), and see if Origin & Origin Games folders are there. If there are, proceed to 2nd one. When re-installing Origin, check where it goes and create the folder. If it says 86x, your folder might be hidden, check the site to read on how to reveal the hidden folders. Windows Site

2. Inserting registry before installing origin & TS2-UC: On that, install Origin & TS2-UC first, and then try to run TS2-UC. Getting that error before running it? Use the Mibunix's registry, however, check where is the game (base+expansions+stuff) installed, and you will have to change the location written below of each base, expansion packs and stuff packs in the registry, by right click it, edit it with notepad/open it with notepad.

For example:

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\App Paths\Sims2.exe]
@="C:\\Program Files (x86)\\Origin Games\\The Sims 2 Ultimate Collection\\Double Deluxe\\Base\\TSBin\\Sims2.exe"
"Path"="C:\\Program Files (x86)\\Origin Games\\The Sims 2 Ultimate Collection\\Double Deluxe\\Base"
"Game Registry"="Software\\EA GAMES\\The Sims 2"
"Installed"=dword:00000001
"Restart"=dword:00000000

To:

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\App Paths\Sims2.exe] 
@="C:\\Program Files\\Origin Games\\The Sims 2 Ultimate Collection\\Double Deluxe\\Base\\TSBin\\Sims2.exe" 
"Path"="C:\\Program Files\\Origin Games\\The Sims 2 Ultimate Collection\\Double Deluxe\\Base" 
"Game Registry"="Software\\EA GAMES\\The Sims 2" 
"Installed"=dword:00000001 
"Restart"=dword:00000000