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.
Halley's makes an appearance once every 76 years. The comet was named after Sir Edmond Halley. A comet has no light of its own. We are able to see a comet because of the reflection of the Sun's light off of the comet and because of the gas molecules in the coma releasing energy absorbed from the Sun's rays.