On starting my computer (Windows XP SP3) I get an error message TPMauth.exe tsp1.dll not found. I saw an answer for this involving Windows 7. What is the procedure for XP?

If you have a Dell with the 'ChangeTPMAuth.exe' application you can try this: One way to fix this issue, if you are feeling brave, is to make a copy of the 'TSP1-wave.dll' file found in the 'C:\Program Files\Wave Systems Corp\Common\NTRU12' folder, rename the copy to 'Tsp.dll' and then move it to 'C:\WINDOWS\system32'. If you have other software installed from a different vendor you might be able to use a similar trick.

If you have a Dell with the 'ChangeTPMAuth.exe' application you can try this: One way to fix this issue, if you are feeling brave, is to make a copy of the 'TSP1-wave.dll' file found in the 'C:\Program Files\Wave Systems Corp\Common\NTRU12' folder, rename the copy to 'Tsp.dll' and then move it to 'C:\WINDOWS\system32'. If you have other software installed from a different vendor you might be able to use a similar trick.Thanks Andy this solution worked...!