There are too many options to list them.
If you ask a question like this again, try to describe it as exact and detailed as possible: When does your computer halts during booting? (while checking the devices, loading the operating system, ...) Did you change something on the computer since the last time it worked? Have you experienced problems with the hard- or software used earlier? Is something plugged in to the computer? (USB Devices are a common cause of booting problems)What hardware and OS are you using?
try, remove the system battery, just for 10 seconds then back again..it will restore to factory seting.
Generally, it is caused by either a hardware conflict or driver problem, either conflict or incompatibility.
HDD and USB
A boot that is frozen in computer language means that a computer started to boot but the screen froze during the boot process. If this happens it might fix the problem if the computer is unplugged for a few seconds and then restarted in Safe Mode.
Could be numerous problems. Most common occurring problem is the CD is scratched and/or the files on the disc were damaged during the production process.
Correcting the problem
It can spill during transportation :)
During a Blue Screen crash, in some cases it will tell you what file (or virus) caused the crash.
Your dum to not no the answer.
its a problem because it can spill during transportation.
Isolating the problem
If it is possible, at least two people should confirm the accuracy of facts and the validity of assumptions during the problem solving process. This helps ensure accuracy.
Wow, um, just wow. Anyway, did the engine crank over before replacing the computer? If so, during the process of replacing the computer did you create a problem with anti-theft or did you forget to reconnect the battery?
Scientists use the scientific method, which is:
someone else may have already solved the problem