I've tried and done everything to stop my 100% disk usage problem, and eventually have found the culprit is Cryptographic Services. Even if I set this to disabled, it reboots to manual randomly. Any way I can disable it? Anyway, the 100% disk usage problem doesn't actually seem to effect my PC at all, and I get about a tenth of a second freeze, then its runs smoothly, but with the disk at 100% for the next 15 seconds. This is quite odd, but I dont know whether it is solved or not? The main problem is gone (100% disk usage spikes causing freezes) but the underlying issue still remains, is this normal, and is it worth trying to fix. Thanks!