Note that memtest86 is a test application, not a means of ensuring integrity: it writes known patterns into memory in order to test it. Windows also has a built

Note that memtest86 is a test application, not a means of ensuring integrity: it writes known patterns into memory in order to test it. Windows also has a built-in version which has the same limitations: you reboot into a special mode where it runs the test, it doesn't work online or validate actual application data. The OS layer is probably the hardest place to do online application data integrity checking: it's too low level to know what data is important and which parts will change and why in a way which allows checksumming to work effectively and efficiently, but too high above the hardware to be able to check the integrity of memory without a massive performance penalty (especially when it comes to how memory is moving in and out of caches). Most solutions work at a higher level in the application itself or lower level with ECC RAM as mentioned in the article.