Hi all ! I have a "back-up" PC, which has the following spec: -- Win XP PRO -- P4 1.6 GHz -- Asus P4SDX MoBo -- 512 MB DDR 333 Kingston (2x250) -- 2 HDDs - ATA 133 Maxtor (120 GB) & ATA-100 Seagate (40 GB) -- 01 Drive of CDR-W and 01 Drive of DVD Since last week, I am having some troubles with it (my MoBo, Memory and HDD of 120 GB are "new" - I have updated these components). Well, the problem is : sometimes, my PC isn't recognizing my HDDs. If I "shake" a bit my case, the system recognizes them... And, another times, the Windows "locks", and I need to restart my PC... I have already runned the CheckDisk, and it didnt find any problem with the HDDs.. Well, I have already, too, lend it to a technical, and he didnt find any problem - the cables were in the right place - no apparent bad contact. So, he said me that it could be a problem with my MoBo. As it is a new hardware, I think that there is no reason for some trouble ... So, I would like to know if there is some SPECIFIC SOFTWARE (freeware), which can to analyse (in a SAFE WAY - with NO POTENTIAL DAMAGE) my MoBO and find if there is, really, some damage in it ... Is there, please ?? Thanks a lot for any help!