Method 1: When the Error Message States the Computer Is Locked by domain\username. 1  Press CTRL+ALT+DELETE to unlock the computer. 2  Type the logon information for the last logged on user, and then click OK. 3  When the Unlock Computer dialog box disappears, press CTRL+ALT+DELETE and log on normally.
Halley's comet returns in bits and pieces. Shooting stars should be visible October 21st & 22nd. October 20, 1998: The last time Halley's comet visited Earth, in 1986, many observers were disappointed because the famous comet was barely visible to the naked eye.
This feature is not available right now. Please try again later. Halley's Comet or Comet Halley (officially designated 1P/Halley) is the most famous of the periodic comets, and is visible from Earth every 75 to 76 years.uring its 1986 apparition, Halley's Comet became the first to be observed in detail by spacecraft, providing the first observational data on the construction of the comet nucleus and the mechanism of tail formation.