Hi and welcome to Bleeping Computer!
I used to have the same problem before. System does not proceed to Windows. This might be caused by a extended effect of a virus attack, as in my case. Though you may have disinfected your system from the virus, if it has already "eaten" a part of your operating system, your computer may not jump into the operating system. In such cases repair of the OS is necessary. If the repair could not solve your problem, then, you might need to reinstall the OS.
I would not yet give the procedures on how to do this because. . .THAT IS ONLY ONE OF THE POSSIBILITIES.
for others to help you better, I suggest that you follow the basics of posting here at bleeping computer.
Here are some reminders:Tell what OS are you using.
State the details of the situation why such problems arise.
(as I've said above, this may be connected to a problem you had in the past)
Check this out while waiting for other replies. Guide before posting about a problem.
Let's have a mental fusion!
Let us do our part to make this world a truly symbiotic place.
For other computer problems, this blog might be helpful:http://cosmicsniper.blogspot.com