Windows Vista

Windows Vista (codenamed Longhorn) is an operating system that was produced by Microsoft for use on personal computers, including home and business desktops, laptops, tablet PCs and media center PCs.

Why It Sucks

 * 1) High system requirements at the time of its launch.
 * 2) It had Digital Restrictions Management.
 * 3) It lacks compatibility with Windows XP.
 * 4) The intrusive User Account Control.
 * 5) It was buggy at launch, but was fixed with Service Pack 1 & Service Pack 2.
 * 6) It was lacking drivers.
 * 7) In 64-bit versions, it only allowed signed drivers to be installed in kernel mode.

Redeeming Qualities

 * 1) Vista's Aero style looked more appealing than the previous Luna style found in XP.
 * 2) Without Vista, Windows 7 and future versions of Windows would not exist.
 * 3) With at least 2GB RAM, WDDM-supported GPU and 1.8GHz, Vista can be very stable.
 * 4) It spawned the Aero theme, a theme that would later be a theme that almost everybody used with Windows 7.
 * 5) Service Pack 1 & Service Pack 2 fixed the bugs.