What Windows services can I safely disable?
Black Viper maintains what is considered by many the definitive guide to Windows services.
http://www.blackviper.com/category/guides/service-configurations/
If you wish to tweak the windows services to reduce memory usage theres quite a well known and respectable list here of what you can and cannot disable:
- Windows XP SP3 32-bit
- Windows XP SP3 64-bit
- Vista SP1
- Windows 7 Beta
Although that said, be careful, and only disable services you're absolutely sure you don't want/need. Don't be trigger happy, this isn't going to save you massive resources.