AHCI or rather Advanced Host Controller Interface enables native command queuing and hot-plugging through SATA host controllers (Serial-ATA) for your hard drives. In many scenarios it enables more efficient multi-tasking.  But an issue with AHCI is that if you install the OS without enabling AHCI in the BIOS, enabling it after installation will render your OS unusable.  This is how you solve it...

For those of you who have the "Spooler subsystem app has encountered a problem and needs to close." error recurring everytime you restart your machine or try to print something, this simple fix could be what you need.

Windows Vista's new interface allows for a lot of advanced features, one of which is the import and export of scheduled tasks.  This easy tutorial will show you how to export your scheduled tasks.