Invalid Page Fault
These are caused by program incompatibility, inconsistency in memory utilization (attempts to call non existing memory blocks) due to bad memory, overheating (CPU cooling fan not operating) and other hardware / software issues.
Illegal Operation
When a program requests to perform an operation that is not understood or cannot be performed by Windows, an Illegal Operation error is fired. Corrupt files, incorrect drivers, bad memory, bad hard drive sectors are few reasons for causing illegal operations.












