Crypserv.exe is a SERVICE. It is in place to check security certificates of software that you install on your computer, and web pages.
There are users out there that think it may be used to watch for bootlegged software and pirated music/videos that are on your computer.
Maybe one day this may be true, but not now.
You can disable this service by going to administrative tools and then 'services'.
Scroll down and look for 'Crypkey license'. Right click go to properties and Stop the service, then choose 'Disabled' in the Start up type slot.
Click OK, close the Services window and thats it.
If you happen to download a program that has been hacked and embedded, and you go to install it, you will get NO warnings.
This service uses about 17K of system memory and holds an above normal priority.
No communication from this service to any external location exists.
It is a good idea to leave this service enabled, since it is harmless to the user.
from - click here