Following a hacking attempt, I've brushed up on my security a lot. One thing that was recommended to me was to use an Eraser to overwrite my temporary Internet files.
So, I've sometimes done this, rather than just deleting. For a while, my PC became very unstable, crashing all the time, switching off and on again, and always telling me it had recovered from a serious error! However, I have a suspicion that using an Eraser might have been incidental in crashing my computer: perhaps something else has come out with the files? Since I've stopped erasing, and just deleting, my system has been perfectly stable - 100%. I still use Eraser to get rid of personal financial stuff etc, and that doesn't seem to be a problem.
Any truth in this, I wonder, or am I way off track?