Found the answer through google. Thanks anyway

RegistryCleanerXP is a new rogue registry cleaner software that shows false warnings about your registry errors and pushes you to purchase their software.
Registry Cleaner XP’s warnings look like a Windows notifications, only the popup warnings says:
“RegistryCleanerXP found ___ critical errors on your PC. Click the ‘Fix Errors’ button to repair these errors.”
RegistryCleanerXP installs itself through security holes.