Reasons Why A Computer Hang Up
3. There are some unwanted processes that causes your computer to freeze - If this is the case, a suspected virus/es may have attack your computer. Try to rescan your disks to see if there are viruses that cause your computer to hang up. The best way to scan your hard disk is to make it slave to other computer that has no malware or virus. That is you have to connect the disk to other computer. You have to scan it there for safety. The last resort is you have to re-install your system by reformatting the disk. Please bakup all your files before doing so.
4. Defective Hard Drive - One thing also that causes your pc to hang up, is a defective hard drive which the system resides. Try to defrag your disk if there are block errors and if there are errors, you really have to replace it. Damage hard disk cannot process well the data and thus it may cause delays.
If all these reasons are not what you think might be the cause. Provided that you have enough memory, gpu memory is also enough and your hard disk it working well and also your pc temperature is good then may be there are still reasons why your computer freezes. The last result would be your motherboard has a problem.