Hey there, I have had great success with this forum (successfully debugged my PC with the help of someone reading my minidumps), and would like someone to read my friend's minidumps as well. Basically, his Vista is crashing every now and then when he is booting up his PC. I have tried everything in the book (reformat, chkdsk etc etc) but to no avail. Oh, and the OS he is using is Vista Home Premium, 64 bit edition. Thanks for the help. Edit - My bad, not only does it crash when he reboots, it alsoi crashes randomly when he does something on the PC, for example, when he was emptying his recycle bin. I should also add that he only had this problem when he bought an extra 2 2gb sticks of RAM, and had to upgrade to 64 bit Vista to get full use of it. I'm thinking it may be because his original 2 sticks of 1gb each are DDR2 1000+, while the 2 new 2gb sticks are DDR800. Both new and old sticks also have different latency settings, but since the BIOS is set to auto, I assume that the motherboard would be set to the specifications of the 2 new sticks (which are not as advanced as the old ones).