Your system is acting strange, with crashes, freezes or sudden reboots. Difficult, especially because the cause is often difficult to determine. This could be software, such as malware or a grumpy driver, but it could just as well be hardware, such as a faulty disk or internal memory. In this article we focus on the latter. What symptoms, indications and memory errors are there, but above all: how do you track down the faulty memory and how do you deal with it further?