clone disk -> random reboot

hi
I have dozend of idendical PCs - same mainboard, vga, HDD, LAN, RAM .. all is the same
instead of installing each PC manuell I setup one PC and use Acronis or Ghost to DNA copy the hard disk sector by sector
for xp64 all is working like a charm - after clone I set IP and PC name and that it

for win7 prof. I do the same but my PC randomly reboot within 3min to 40min

I have
-no hint in event log (expect impropper shutdown)
-stoped most services
-killed all task
-no bluescreen, popup, error message
-"disable reboot on system failur" do not affect
-disabled all onboard hardware bios and disabled non importent devices
-lastest drivers (or factory drivers)
-disable all "energy save" options
-installed all W7 updates and fixes
-win7 boot without problems
-common up to date hardware

only "save mode" is stabil and not reboot (within 12 hour tested)

I install W7 -> plug disk to other PC (new hardware found message about HDD) -> pc permanent reboot randomly within 3 min -> disk back to source PC -> all fine

I have no clue what to do (poem)
I waste 14 days on that matter without success

any hints?

LAN is unplug so they cant find

trail for testing before buing

I dont get you - I use the 30 day trail ...

if one of my servers die with disk error I cant reinstall all and everything again
I run dozend of applications with hundreds of plugins
over time I update and modify that may little thing I not remember 9 weeks later
I need my servers identical up to the last bit

I wonder why W7 cant bear the "movement"
IBM not install each PC by hand - they clone a master disk as I do

its not a matter of cloning
even if I use the orginal disk and put it to another server I am back at reboot

hm
installing 350 times W7 and all of my appliactions plus backup each disk each time I update one application to have a backup in case I have a disk error or one update messed the system

no real way