Are possible. Your post neglected just one little detail so all I can offer is that this file didn't show up on a Full Microsoft Retail XP Home SP2 CD I used last week.
Here's what I did:
1) Reformatted my PC with the remove everything option (cable unplugged)
2) Installed and turned on Zone Alarm
3) Plugged in cable
4) Downloaded all Windows updates
5) Installed and Ran Spyware Doctor, and Spyware Doctor reported an infections:
A legitimate application. Under certain circumstances, however, some people may find it undesirable.
C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Broadband\Remove Desktop Dialer.lnk
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\SharedDLLs, C:\Windows\unvise32.exe =1
Is it possible that the above is a legitimate program? I really don't expect to see any infection after spending 4 hours on a system reformat. Many thanks for your help.