Since these tools are distributed via unofficial channels, they are frequently bundled with trojans, miners, or spyware.
Microsoft’s infamous update KB971033 was designed to detect and remove existing cracks. RemoveWAT 2.2.6 was the first tool to completely disable the WAT components that KB971033 relied upon. If you installed KB971033 after using RemoveWAT, the update would fail to install (citing "Service not found")—effectively immunizing the system.