Everytime I try to extract a file for my Sims 3 game to

C:\Program Files\Electronic Arts\The Sims 3\Mods\Packages

I always get this message: ! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create 3cc8e3e7_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create 3dcb0433_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create 3e7cdc14_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create 4a430c9c_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create 64b3b6a2_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create 64ed8dd2_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create 921dbf75_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create 9955c104_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create 61217976_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create b54b9b5e_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create b2439fe7_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create bbe9fb14_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create cb1f5cf8_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create d39f882b_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: Cannot create dea68984_shady_naked-soul.package
! Access is denied.
! C:\Users\Admin Istrator\AppData\Local\Temp\MTS_-Shady-_1013336_shady_naked-soul.rar: No files to extract

And if I try to save the WinZIP file in

C:\Program Files\Electronic Arts\The Sims 3\Mods\Packages

I get this message: "You don't have permissions to save in this folder, please Contact the Administrator. Would you like to save in the Admin folder instead?"

Yet, I am on the Admin User.

So, can someone tell me why my folder is blocked? And how I can unblock it to extract Sims 3 downloads into the Packages folder?

Thank you

For the first problem, save the files to your desktop (or anywhere else) rather than hitting Open when the download window pops up.

Secondly, er.. seems unlikely that even Microsoft would call the default admin account "Admin Istrator". Is this an admin account that you've set up?
Try downloading the .rars to desktop or something, extracting them there, and then copying the extracted .package files to Mods/Packages.

Urrmmm...@Vivalamarlier, having a user named Admin is a different kettle of fish to having an administrative account with the full permissions and privileges.

(and yes, check spelling of that username as whiterider mentioned above)