为什么当我尝试下载Android支持包修订版10时，它一直说文件未找到？

The only way I can get eclipse to work for writing android apps is by installing the Android Support Package(revision 8, 9, or 10) from the android SDK. I click on the link to download it and it then tells me this: SDK Manager] File not found: C:\Program Files (x86)\Android\android-sdk\temp\support_r10.zip (Access is denied). I do not know why this is happening and I can't even create a project until I fix this problem. Please help. Thanks.The only way I can get eclipse to work for writ