Welcome to TechSpot
There are 3 entries "RemoteAccess", one in HKCU, one in HK_USERS\.default and one in the first HK_USERS\S-1-5....
The HKCU and S-1-5 have an entry "\Profile\[your dial-up ISP]\AutoConnect" with Reg_dword value 0 (on my PC).
My PC has W2K/SP4 and broadband, no modem in it, and it is set to "Never dial a connection"
See what it shows there.