What is it?

sdhelp.exe is associtated with pctools spyware doctor application.

What does it do?

From pctools.com:

"Spyware Doctor is a top-rated malware & spyware removal utility that detects, removes and protects your PC from thousands of potential spyware, adware, trojans, keyloggers, spybots and tracking threats."

More info:

Read more about Spyware Doctor at [url=http://www.pctools.com/]pctools.com[/url]