I lost most of my yahoo messenger contacts how can i retrive them back ?

You may have a corrupt file and need to un-install then re-install Yahoo Messenger. However, before you do that, let's consider the following and try several things first. 1.) To run properly, Yahoo Messenger needs Sun Java, and the latest version of Adobe Macromedia Flash Player. Click on these links to make sure they are installed and up to date: Sun Java: http://java.com/en/download/ Adobe Macromedia Flash Player: http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash 2.) You must have scripting enabled. To enable scripting: Click the "Tools" menu on your Internet Explorer toolbar and select "Internet Options." Click the "Security" tab. Click the Internet (globe) icon and click the "Custom Level" button. Scroll down to "Scripting." Enable the following: * Active scripting * Allow paste operations via script * Scripting of Java applets are all enabled Click the OK button at the bottom of the window. 3.) You may have too many programs running in the background draining your system's resources. Click on: Start Click on: Run Type: msconfig Click on: Startup Uncheck: All programs which you don't need starting up every time you reboot or restart your computer. 4.) Only have one browser window open when you are on the Internet chatting through Yahoo Messenger and close all other applications you were using such as Limewire, Paint, Word, etc. because they ALL use up memory. Having too many programs and applications running will cause your Yahoo Messenger to lag or malfunction. 5.) If (Steps 1-4) do NOT solve your problem, try un-installing then re-installing your Yahoo Messenger: How to un-install Yahoo Messenger: Close Yahoo Messenger Click on: Start Click on: Control Panel Click on: Add/remove programs Locate and remove Yahoo Messenger 6.) Download Yahoo Messenger. If you don't see the particular one you are looking for, *click the link at the bottom: Yahoo Messenger for Vista: http://messenger.yahoo.com/windowsvista.php Windows Messenger 6.0: http://www.freecreed.com/downloads/yahoo!/ymsgr_1922.exe Windows Messenger 7.0: http://www.freecreed.com/downloads/yahoo!/ymsgr_7.0.0.242.exe Windows Messenger 7.5: http://freecreed.com/downloads/yahoo!/ymsgr_7.5.0.814.exe Windows Messenger 8.0: http://www.freecreed.com/downloads/yahoo!/ymsgr800_716_us.exe Windows Messenger 8.1: http://us.dl1.yimg.com/download.yahoo.com/dl/msgr8/us/ymsgr810_415_us.exe Windows 9.0 Beta: http://us.dl1.yimg.com/download.yahoo.com/dl/msgr9/us/ymsgr900_907_us.exe *For about 20 other versions of Yahoo Messenger, click here: http://www.freecreed.com/ymsgr-archive.html 7.) If none of the above suggestions solve your problem: Here is a link to a Yahoo Messenger Help Request Form. Since they don't provide categories for EVERY problem or question type, pick one that fits as close as possible to your problem, making sure to go into a lot of detail when describing your issue(s) or asking a question: Here is a link to a Yahoo Messenger 8 Help Request Form: http://help.yahoo.com/l/us/yahoo/messenger/messenger8/help8.html?from_url=http://help.yahoo.com/l/us/yahoo/messenger/contactus/contactus-01.html Here is a link to Yahoo Messenger Beta 9 Help form: http://help.yahoo.com/l/us/yahoo/messenger/messenger9/help9.html?from_url=http://answers.yahoo.com/question/index?qid=20071210093850AAFTWtd&r=w&pa=FZptHWf.BGRX3OFMiDNWUIxS0YuiD2BSkV8ulPr_aCkz9PcqVg--&paid=answered#EqJYHmv7CXbf69ah2y1z Here is a link to a Yahoo Messenger for Mac Help form: http://help.yahoo.com/l/us/yahoo/messenger/mac/general_mac.html VISTA USERS: I have not found a link to a Yahoo Messenger Vista Help form yet. Pick one of the forms above to fill out and send in. It can't hurt anything and hopefully Yahoo will respond with the answer(s) you are seeking! Since they don't provide categories for EVERY problem or question type, pick one that fits as close as possible to your problem. Make sure to go into a lot of detail when describing your problem or asking a question.