hl2.exe has stopped working...

i get this everytime i quite the game in vista but not when i start it up...make sure your not using AVG antivirus darkmagician06

I get that error message when i quit using the F10 button!

Depending on what Vista OS you are using... try this. It's taken from the steam forums and worked great for me.

----------------------------------------------------------
For users with Windows Vista Ultimate or Business editions:
(Credit goes to blueshot from MS forums)

>>Right click "Computer"
>>Click "Manage"
>>Double click "Users and Groups"
>>Click "Groups"
>>Right click "Administrators"
>>Click "Add to group..."
>>Click "Add"
>>Click "Advanced"
>>Click "Find Now"
>>Double click "Local Service"
>>Click "Ok"
>>"NT AuthorityLocal Service" should show up in the list now
>>Click "Ok"
>>Close Computer Management and reboot.
----------------------------------------------------------

----------------------------------------------------------
For users with the Home editions of Vista:
(Credit goes to SWAndersen)
Go to the command prompt (hit run and type in cmd.exe)
and type this in:

net localgroup Administrators /add Local Service

(optional)
then you can type this in:

net localgroup Administrators

and if LOCAL NT AUTHORITY/SERVICE is listed, then it worked. Now go reboot.

if you have vista turn off UAC