Android and Web build problems. Unknown reason.

Hello community. I have investigated about this but could not find an answer. I have lost a lot of working time because of this. Please help.

When I try to build for web I get this:

 Error building Player: LZMA Compression failed

When I try to build for android I get this:

 Failed to re-package resources with the following parameters:
 package -v -f -m -J gen -M AndroidManifest.xml -S "res" -I "C:/Users/Irving/Desktop/android-sdk_r18-windows/android-sdk-windows/platforms/android-15\android.jar" -F bin/resources.ap_
 Configurations:
  (default)
 
 Files:
   AndroidManifest.xml
     Src: () AndroidManifest.xml
 
 Resource Dirs:
 Including resources from package: C:\Users\Irving\Desktop\android-sdk_r18-windows\android-sdk-windows\platforms\android-15\android.jar
 applyFileOverlay for drawable
 applyFileOverlay for layout
 applyFileOverlay for anim
 applyFileOverlay for animator
 applyFileOverlay for interpolator
 applyFileOverlay for xml
 applyFileOverlay for raw
 applyFileOverlay for color
 applyFileOverlay for menu
 applyFileOverlay for mipmap
 AndroidManifest.xml:4: error: Error: No resource found that matches the given name (at 'icon' with value '@drawable/app_icon').
 AndroidManifest.xml:4: error: Error: No resource found that matches the given name (at 'label' with value '@string/app_name').
 AndroidManifest.xml:5: error: Error: No resource found that matches the given name (at 'label' with value '@string/app_name').
 AndroidManifest.xml:11: error: Error: No resource found that matches the given name (at 'label' with value '@string/app_name').
 AndroidManifest.xml:13: error: Error: No resource found that matches the given name (at 'label' with value '@string/app_name').
 AndroidManifest.xml:17: error: Error: No resource found that matches the given name (at 'label' with value '@string/app_name').
 
 UnityEngine.Debug:LogError(Object)
 PostProcessAndroidPlayer:PostProcess(BuildTarget, String, String, String, String, String, String, BuildOptions) (at C:/BuildAgent/work/14194e8ce88cdf47/Editor/Mono/BuildPipeline/PostProcessAndroidPlayer.cs:300)
 UnityEditor.HostView:OnGUI()

Things I did before this started happening: - Installed Unity 4 replacing 3.
- Installed Unity 3.0.0 in another folder.
- Had Unity 3.5.5 project backup that I later moved into my repository. - Installed Unity 3.5.6 over 3.0.0. (The problem started here). - Removed Unity 3.5.6 . Installed 3.5.5 - Changed a Texture size to 480 x 320

I've tried: - Restarting computer. - Unity reinstall. - Moving project folder. - Building in a different folder (an empty one). - Changing C# 2.0 subset to 2.0 - Changing the app icon. - Changing minimum API Level.

Nothing works. Does anyone know how to fix this? Thanks in advance.