You can´t stop the attacks, but you can stop the nofications.
Open BullGuard. 2. Go to the Firewall - Overview tab and set the userlevel to Advanced. 3. In the following window, go to the Profiles tab and double click on Custom Security. 4. Then, Go to the Notifications tab. 5. Once there, untick the "Display a security notification" box in the "When a security event occurs" section. 6. When back to the Profiles tab, highlight Custom Security and press Activate.