Little by little I'm getting more hopeless. Not because of you guys ! I really appreciate the time you put in this forum, and I'm so thankful for the interest you all show in my "mess", in my stupidness. I really do appreciate that you allready gave me very valuable tips. My problem is still not solved, but I really don't blame any one on this forum. I DO understand that it is not easy to troubleshoot a computer that you've never seen.
What I already learned is that
-Making restore points is not enough to recover from a disaster...
-A system image seems to be absolutely necessary !
-I'll need a better cooler for my CPU (thinking about getting a water cooling system)
Tonight I'll do some more tests, and follow some more of your proposals. By now, I think that I can be sure that (luckily!) there's nothing wrong with my harware. Running the memtest68 for about 5 hours, and working in DOS for hours and hours trying to repair without errors kinda convinces me that there's no harware problem, not in the RAM, not in the CPU.
I cannot make screenshots because Windows is not running at all. (I access this forum with my laptop).
Now let's assume that we can't get this problem solved and i have to reinstall windows. Then my question is : how do I reinstall without loosing too much?
I was thinking about this scenario :
Install Windows on a new HD. (I would use a new 120GB SSD)
Use the last (working!) restore point on this new HD/Windows intallation. OK, All the progs that were on my old C: drive will be lost, but (where possible) I've installed all programs on E: (what is on another HD).
My HD layout is as follows :
C: 60GB SSD > one partition, only has WINDOWS and OFFICE + other things that HAVE to be on C:
I already made a copy of the .pst file and the rules-file, so after reinstalling Office I won't have lost alot...
D: "My Documents" on 1T HD, partition size 100GB
E: " Programs files" on same1T HD, partition size 100GB
F: 800GB "data" on same1T HD
The restore points I made include C: and E: !
If this would work, :
-how do I make a copy (in DOS !!!) from my "restore point(s)-file" to another working partition (e.g. F

?
-How do I have to "restore" from this (moved) restore-file when my new windows is installed.
-Will I be able to use the progs on E: again ?
I know how to copy in DOS, but I don't know where to find the file that contains the restore point(s)...
Thanks in advance guys !