I found that in xp only the beta would occasionally loose the icon from the task bar and the desktop shortcut plus opening via program's would not work. no idea why it occasionally turns off.
in my case a reboot solves the problem on a temp basis.
Fujitsu Lifebook P727 laptop review
11 best portfolio websites for designers and artists
Office for Mac buying guide: Price, Office 2017 rumours & new features
Comment désactiver les programmes qui s'exécutent au démarrage de Windows 10 ?