Sims 3 Launcher Error "there was an error during start up, please see log..."
@mubsdell One of the causes of this error is mismatched, missing, or corrupt registry entries for the game. I'm not sure why that would have happened after you started playing, although a cleaner app could interfere. Another is a corrupt file in the user folder, but you don't have that folder at all; or perhaps borked permissions for the Documents directory.
By the way, please undo any compatibility mode you've set for Sims 3; it should run fine in Windows 10.
At any rate, just in case it's that simple, try running Origin and Sims 3 as an admin specifically at the same time: right-click on the Origin shortcut and select "Run as administrator," then do the same with TS3.exe, with Origin already open. If this doesn't work and you have a third-party antivirus installed, please disable it temporarily, just to see whether it makes a difference.
If that doesn't help, another quick step is to try playing in a new admin user account on your computer. You shouldn't have to reinstall anything; just sign into Origin with your current account. Keep running Origin and Sims 3 as an admin though.
If that doesn't help either, you'll need to do a clean uninstall of Sims 3, and Origin for good measure, then reinstall.
Start by uninstalling Sims 3:
- Download Revo Uninstaller (the free version is fine) from here.
- Launch Revo, select Sims 3 from the list, and click Uninstall.
- Once the game is uninstalled, select "Moderate" under "scanning modes," and click Scan.
- Review the list, in case there's something you want to save; otherwise, click Select All, and then Delete.
- Close Revo, and restart your computer.
Next, uninstall Origin:
- Quit Origin, then right-click on the Task Bar and open the Task Manager. Scroll through looking for Origin entries. If you find any, click on them and End Task.
- Clear Origin's cache.
- Launch Revo again and uninstall Origin, and when it's uninstalled, select "Moderate" again and Scan.
- If Revo finds any remaining registry entries, select all, delete, and click Next.
- Revo will display "Remaining Data and Folders. Select all of them except for the "Origin Games" folder, if it appears. (This is where other Origin games are installed by default.) Delete the rest.
- Close Revo, and restart your computer.
Next, download the full Origin installer and run it. Here's the direct download link:
http://download.dm.origin.com/origin/live/OriginSetup.exe
Be sure to run both the installer and Origin itself as an admin. When it's reinstalled, download Sims 3; you can just download the base game, to save time, if you want.
