What I have encountered from pup.optional.crossrider.a;
My system has some spyware/adware on it, which is causing it to behave strangely, and then I run a scan with free scanner and then find Pup.optional.crossrider.a. The following issues have caused by this PUP.
1. Web browsers (Chrome, Firefox, IE) have been taken over with pop-up ads or links.
2. Very slow typing and response to typing with wireless and wired keyboard.
3. Strange pop ups and ads flashing up when browsing,
4. The computer is still not working properly.
5. Try many means to remove pup.optional.crossrider.a without luck.
