Hi Lorzee,
Open Windows File Explorer
Navigate to C:\Windows\Temp
Delete the contents of that folder
Close File Explorer
Open Control Panel - Programs and Features
Scroll down to find BitDefender and select that and choose Uninstall if it is listed
Close Control Panel
Press Ctrl + Shift + Esc to open Task Manager
Click on the Startup Tab
See if BitDefender is listed there
If it is, select it and click 'Disable'
Close Task Manager
Click your Start Button, type msconfig and hit Enter
When the System Configuration dialog opens, click on the Services Tab
Check the box marked 'Hide Microsoft Services'
In the remaining list see if BitDefender is listed there , uncheck any you find
Click Apply and OK
Restart your System and this annoyance will be gone . . .