Windows Update

Windows Update is a service first introduced in Windows 98 and automates the downloading and installing of Windows software updates over the internet. It delivers updates to the Windows operating system as well as various Microsoft products.

Why it Sucks

 * 1) The Automatic Updates feature first introduced in Windows 2000 is notorious for repeatedly interrupting the user whenever they're working on their computer, and it always happens at the worst possible times. An intrusive dialog box appears harassing them to restart their computer. If you click Restart Later, the dialog box will reappear within five to ten minutes and won't go away until the computer is restarted. As a result, Windows Update gained a notoriously awful reputation for this. In some cases, it will automatically restart, causing you to lose any unsaved work. Thankfully, you can postpone them starting from Windows Vista onwards.
 * 2) The service can determine whether or not your installation of Windows is pirated, and eventually prevent you from using Windows if it is.
 * 3) Installing updates takes way too long and is a big waste of time. Sometimes it can install updates in the hundreds or even thousands digits, eventually rendering your computer unusable for a day or two. Windows Update can freeze at times, resulting in even more wait time.
 * 4) Some updates can cause Windows to fail to start or even blue screens, forcing you to either do a System Restore or in some cases reinstall Windows.

The Only Redeeming Quality

 * 1) Updating can help make your computer up to date.