I had this issue lately too, and although I read the replies here, none of them helped (I couldn't even find my task bar let alone the VOIP element) and whenever I tired to delete or rename the file 'program', it wouldn't let me because of administrative
'rights.
So I turned to my trusted McAfee (not helpful, I know, if you don't have this) and found a 'shred' icon which I clicked on, and lo and behold the file was 'shredded'. I think I know how come this c:program file came about because recently I deleted my whole
gallery of photos from my phone and so looked to the web for assistance, and so downloaded a couple of 'software retrieval' things... presumably - even though I went back and uninstalled these in the control panel - this left some 'residue' in the program
system somehow (I'm not a techno buff so I could be wrong).
So, yeah, try using whatever security/shield thing you have on your system as see if it has an 'exterminate' icon ;)