Muhammad Hassan founded TechInfo Daily and writes most of what appears on it. He has spent years fixing other people's computers, which is where these guides started: the same handful of Windows faults turning up again and again, usually with a bad answer sitting at the top of the search results. He works on Windows 10 and 11, on desktops he has built and laptops he has taken apart. Each guide follows the order he would work in himself, starting with the check that tells you which problem you actually have before it tells you to change anything. Where something cannot be tested first-hand, the article says so. Where a claim depends on Microsoft, it links to Microsoft.
Windows troubleshooting fails when a fix gets applied before the fault is located. Only four layers can break: hardware, firmware, Windows itself, and something you installed. Work out which layer you are in, and the right repair picks itself.
Take that last sentence seriously. Of all the blue screen codes, this is the one where a single specific fix resolves most cases, and it takes two minutes in Device Manager.
Nearly all of these come down to four things: a bad driver version, heat, an overclock, or power delivery. Three of the four cost nothing to test.
The name misleads people. It has nothing to do with antivirus, Secure Boot or an attack on your PC. It refers to the integrity checks the kernel runs on its own bookkeeping.
Microsoft's reference for bug check 0x3B describes it as an exception raised while executing a routine that transitions from non-privileged code to privileged code, typically a null pointer dereference or an access to a random incorrect address. Memory freed too early and corrupted data structures b
PAGE_FAULT_IN_NONPAGED_AREA is bug check 0x50, and it fires when Windows reaches for a memory address that should always have been resident in RAM and finds nothing valid there. Faulty memory causes it most often. A driver touching memory it already released causes most of the rest.
Kernel code runs at different interrupt request levels. Above a certain level the memory manager can't service a page fault, so code there may only touch memory guaranteed to be resident in RAM. Reach for pageable memory anyway, or follow a pointer to an address that no longer exists, and Windows st
MEMORY_MANAGEMENT is bug check 0x0000001A. It fires when the Windows memory manager finds an internal inconsistency it cannot safely continue from. Faulty RAM is the likeliest single cause, though an XMP profile, a driver or a failing disk produce the identical screen.
Secure Boot showing as Unsupported? Three different situations cause it. Find out which one you have and fix it without reinstalling Windows.
CRITICAL_PROCESS_DIED is bug check 0x000000EF, and it means a system process Windows cannot run without has terminated. Repair the system files first with DISM and SFC, then look at whatever driver or update changed most recently. Those two steps cover the majority of cases.
