Hi Lukex, and welcome. I've split your question into a topic of its own because we ask that people refrain from piggy-backing their questions onto another topic. It's highly unlikely that your problem will be identical to someone else's, and your 'freeze' issue is certainly a different problem to a system which can't complete POST. You're obviously getting through POST or otherwise your system wouldn't boot into Windows.
1. Have you two or more RAM modules from different manufacturers or of different models? Sometimes 'mix and match' RAM can cause freezing and rebooting issues.
2. Have you tried formatting and reinstalling? Unless you try with a freshly installed Windows installation, it's almost impossible to narrow possibilities down to Hardware issues.