Someone Please Help

hey there guys i was wondering if someone could help me,i had this issue about 3 weeks ago when i installed the trial version but now it has returned after i brought the full version 2 weeks ago.

basicly i get this error pop up when i got to open rekord box saying

" Performance mode can not be used because the system clock of your computer was changed. please contact customer support"

which i did and they had no idea?

hope someone can help me as its quite annoying when youve paid for a service which is not working (twice)

Many thanks

Ricky