Spybot found crypt32chain in the crypt32.dll. It was set as a startup file. I was not familiar with it so I started searching for what it is and I keep getting it is a backdoor file. (I disabled it from start up)

I would like to know how to get rid of it without having to pay for some program. I have searched the registry and can't find it. There is a crypt32.dll in windows system32 folder but I also am finding that it is supposed to be legit. Which is it, can I delete the crypt32.dll which is where the crypt32chain is located or not? If not, how?

Thanks!