For antivirus, just one will be enough. If you are unsure, go
for online scans.
For anti-spywares, having a few more on the computer doesn't kill
you.
List of Anti-spywares
WMP died on you have a couple of reasons:
1) Too many programs are in used. This will take up a lot of
computer resources and slow down the computer. Close any unused
programs.
2) Not many programs are in used but one of the programs is using
lots of computer resources. Open up Task Manager and go to the
Processes tab. Look under the Mem Usage. If one of the programs Mem
Usage keeps going up, kill that application and restart it. Be
careful when killing the application. Killing the wrong one will
result in system instability. Usually those that you can kill
include Internet browsers like IE, Firefox and games.
3) If you are playing a song directly from the Internet, check that
the file can be played. If not, WMP will hang on you.
