Go to the link below and under the letter "N" scroll down to "Notification Area - Icons Disappearing" where you'll find a possible fix.
I keep loosing the volume contron icon in the task bar.
If I uncheck the "place volume control icon on task bar", click apply, then recheck "place volume control icon on task bar", it works. However, when I reboot, the icon is gone. When I check in the control panel, sound and properties, the box is still checked, but the icon is gone. I have tried rebooting, no luck. I restored the computer to an earlier time and I got the icon, but upon reboot, no icon. (volume box still checked). I have scanned for viruses, and there are none. Also scanned for spyware and all is well. I have installed no new software or made any other adjustments to my computer. I am the only one who uses it.
Any ideas on how to fix this problem is appreciated.
Windows XP, service pack 2.
HP Pavillion AMD Athlon 64 X 2 Core Processor 4600
2 gig of ram