Cryptographic Service?

I am in the process of reinstalling Windows XP Home on a new hard drive, etc.

I was doing a Windows update of all of the files, and most updated OK.

However, I cannot update the XP Service Pack 1 because it says that "Setup could not verify the integrity of the file update.inf. Make sure the Cryptographic service is running on this computer."

Gosh can anyone give me a clue as to what to do on this one? How do I check the cryptographic service, etc, so that I can install the service pack?

 

Go to the Administrative Tools utility in Control Panel.
Double-click Services. Right-click Cryptographic Services,
and then click Properties. Click Automatic for Startup type, and then click Start.
Now try to reinstall Windows XP Service Pack 1 again.

 

Stop the Cryptographic Service---->

Go to Start >Run and type:
net stop cryptsvc
OK.

Then, go to your Windows\System32 and find a folder named "catroot2". Rename it to "catroot2old".

Go back to the Run box and start the Cryptographic Service---->
net start cryptsvc
OK.

Try reinstalling again.