Windows Messenger is one of most simple version of msn, you may want to uninstall it and install higher and better version, called windows live messenger. From control panel, you are unable to see windows messenger from there, so you have to manually type command to uninstall it.
Solution:
Go to Start -> Run and type
RunDll32 advpack.dll,LaunchINFSection %windir%\INF\msmsgs.inf,BLC.Remove
Press “enter”
Sometimes, Vista will block the uncategorised program to prevent the malicious software running on computer. If you are sure the program in the block list is safe enough to run automatically after windows logon each time, please see the solution steps below.
Solution:
Start—-Run—-and type in msconfig
Go to Startup Tab and remove the app that is blocked by Vista noting on a sheet of paper where the program is run from.
If the program app is run from the startup menu, then just go to Start—All Program Files—Startup Folder and remove the app there.
After removing the app, create a app Task using the Task Schedule with full VISTA blessed permission by following the instructions below:
1. Launch the Task Scheduler
Example: Start Menu → All Programs → Accessories → System Tools
2. From the Actions panel on the right, select Create Task…
a. Give the app a name of your choice in the “Name Section”
3. Go to the Security Options on the General tab
a. Select an user account with administrative privileges
b. Select the radio button Run only when user is logged on
c. Check the box Run with highest privileges
4.Go to the Triggers tab and click New…
a. In Begin the task, select At log on
b. In the Settings options, select All users
c. In the Advanced Settings options, check the box Enabled
d. Click OK to close the dialog
5. Go to the Actions tab and click New…
a. For Action, select Start a program
b. In the Settings options, browse for the Program/Script you want to execute on
startup
c. Click OK to close the dialog
6. Go to the Settings tab
a. Check the box Run task as soon as possible after a scheduled start is missed
b. Uncheck the box Stop the task if it runs longer than
7. Change any other desired settings
8. Click OK to save and close the task properties