To disable Spyware. use the constant defend function for Windows Defender.
In Windows Vista, please refer to the following contents to disable Spyware.
1. Click the Start button.
2. Select All Programs, and click Windows Defender.
4.Click Options in Tools and Settings.
5.Choose Automatically scan my computer(recommended) in the Automatic scanning
[About Automatic scanning function]
Automatic scanning function is a function of monitoring important Check point in Windows.
The Checkpoint comes out when software's are installed in PC, Spyware or other junk software's are automatically installed and the settings of Windows are modified due to some programs. In Windows Defender, alarms will be made if there is modification to Checkpoint. Then you can choose whether modification is allowed or not. Please set modification to allow installation to be continued in the case you would like to install software yourself.