New
#91
Please upload all chkdsk logs Check Disk (chkdsk) - Read Event Viewer Log - Windows 7 Help Forums
Answers to your questions:
I don't think the Personalization CSP will help since it is about the restrictions with background images on the lockscreen and the desktop, i.e. the possibility to change them and the restriction for changing them.
Memtest86+ is the name of the test, it does support 64x.
In regards to BSODs, it unfortunately appears that your system had 2 BSODs 5 days ago. Both appeared because something violated an access right on the memory, either on RAM or the pagefile.