acer all in one PC/VZ4620G-Ui3322x has VIDEO CAM
do I need to install drivers and software since I can not find it on my computer?
You can find the driver here: http://us.acer.com/ac/en/US/content/drivers (Select your OS before downloading the driver).
Camera Chicony Camera Driver 6.1.7600.108 12.3 MB 2011/12/29
As far as what software it uses you will have to consult the user manual or contact Acer. There may be some webcam software you can download that will work but none is listed on the Acer site. It could be CyberLink® YouCam® (http://community.acer.com/t5/Desktops-All-In-Ones/Acer-Aspire-z5600-All-In-One-Factory-Installed-Webcam-Software/m-p/95313/highlight/true#M4926),
CyberLink YouCam software is a free download from CyberLink: http://cyberlink-youcam.todownload.com/?lp=adwords&tg=us&kw=Cyberlink%20youcam&mt=e&ad=25289000118&pl=&ds=s&gclid=CMu65bv1l7oCFc2f4AodLmQA8w