How to solve “An unknown error occurred (-42110)” no iTunes

Installed iTunes no meu notebook com Windows 8 and the message “An unknown error occurred (-42110)“, something like “An unknown error occurred (-42110)”, was always displayed when I opened iTunes. Searching the Internet quite found the solution for my case in site support Apple's own. The information on the website is that this error happens because iTunes asks repeatedly for you to allow your computer to run items purchased from the iTunes Store.

In my case my computer was already authorized to accept items purchased, but still the error was made. The solution to this is as follows:

First: Show hidden files and folders

First of all, if your operating system is Windows, you must ensure that all files and folders are displayed. Windows has an option to hide some system files to protect them from being accidentally deleted by the user. As in this case we know exactly what we're doing, first follow the tip below, selecting the version of your Windows, to be able to display these hidden files.

• Windows XP

  1. Open Windows Explorer pressing the set key “Window E” or button Start > All programs > Windows Explorer;
  2. Click on the menu Views;
  3. In Hidden files and folders, click Show hidden files and folders.

• Windows Vista

  1. Button Start > Control Panel > Appearance and Personalization > Folder Options.
  2. Click the tab Display.
  3. Click Advanced Settings, then Show hidden files and folders and finally OK.

• Windows 7

  1. Open Control Panel. Say: use the set key “Window R”, type “control” and hit enter;
  2. Select the item Folder Options. Should you not find, see that on the right, over the window, there is the option “View by:”. Change this option to “Small Icons”. Now to make it easier to find the item options Folder;
  3. Tab View, area Advanced Settings, check the Show Files, pasta and hidden units.

• Windows 8

  1. Open Control Panel. Say: use the set key “Window R”, type “control” and hit enter;
  2. Select the item Folder Options. Should you not find, see that on the right, over the window, there is the option “View by:”. Change this option to “Small Icons”. Now to make it easier to find the item options Folder;
  3. Tab View, area Advanced Settings, check the Show Files, pasta and hidden units.

Deleting the correct folder

You should now delete the folder “SC Info” your computer.

1. Close all open programs on your PC or Mac;
2. See what your operating system and access the folder path specified:
   • Mas OS X: /Users/Shared/SC Info
   • Windows XP: C:\Documents and Settings\All Users\Application Data\Apple Computer\iTunes\
   • Windows Vista: C:\ProgramData Apple Computer iTunes
   • Windows 7: C:\ProgramData Apple Computer iTunes
   • Windows 8: C:\Documents and Settings\All Users\Application Data\Apple Computer\iTunes\
3. Delete a pasta “SC Info” and restart your computer.

Soon, Now the message should disappear when you start iTunes. Worked for me.

Any questions write in comments to try to help.