%90 of the time I'm getting BSOD at Windows log in since the last 17063 Build. I've checked the Minidump and it's apperantly caused by ESET. I'm using Windows 10 Insider Preview and that's probably why it's happening  Here is the information if anyone cares: IRQL_NOT_LESS_OR_EQUAL (a) An attempt was made to access a pageable (or completely invalid) address at an interrupt request level (IRQL) that is too high. This is usually caused by drivers using improper addresses. If a kernel debugger