and it's expected to be another big week for ipos. about a dozen companies are execed to make their public debuts on either the nasdaq or the new york stock exchange this week. most note ably allied financial. finally, tuesday marks the end of an era for microsoft, it's when the company will stop issuing security updates and end almost all technical support for its 12-year-old xp operating system. the system is in use on a third of computers around the world. it does not mean they will stop functioning but they will be more vulnerable to malware and viruss. it's recommended that a copy of windows 8 be bought if your