What can I do when my computer freezes

A simple method to resolve, if the computer is in the trouble of hang by freezes. Check and press the “NUM Lock Button” from the keyboard, check the light on NUM lock is that on or off.
If the NUM Lock light is on and off its mean there is no problem from here. Press CTRL+ALT+DEL together for close the running Microsoft Windows and click on the end button to reboot the system.
Later on, wait for a while, reboot the computer; it’s entirely locked and will not recuperate. Here You should mentally prepared that all work which you have done is going to be misplaced and will not recuperate if the information is not being saved.
Wish you good luck to resolve this matter
Its look like you have some virus in your computer which freezes your computer at any time. Lets see where the problem is located, please follow these steps.
Once you have checked all of these steps i am pretty sure that you will be able to solve your problem.
RUNDLL error can be the cause why your computer performs slow and hang up. Clean your Registry will help you to resolve this problem as well pay a visit this Techyv post too to get more help.