as Javova said, but with one extra step - clearing out the registry.
1.Go To Control Panel,
2.CLick on Add/Remove Programs/
3. go to Windows Setup/ click on Communications/
4. click on details button
5. uncheck dial-up Networking.
6. Close panels, Click no to question to reboot.
7. Go to Run: regedit.
8. Backup your Registry
9. Open Local Machine--System--CurrentControlSet--Service--
10.Find Winsock2 and delete entry.
11. Yes to deleting folder
12. Restart Computer.
13. Go Control Panel/Add/Remove Programs
14. click on Windows Setup tab click Comunications/click on details
15. Check Dial-up Network and close. Say yes to any questions.
16. Restart Computer.
Sorry if this is rudimentary format .. I end up sending it to family way to often.
Regards