See if you can troubleshoot by doing a 'clean boot'.
Boot into safe mode.
Clean Boot will help you start your computer by using a minimal set of drivers and startup programs so that you can determine whether a background program or any of the third party service is interfering with your program.
please follow the steps below.
1. Click Start on your Desktop
2. Type msconfig in the Start Search box and then press ENTER.
If you are prompted for an administrator password or for a confirmation, type the password, or click Continue.
3. On the General tab, click Selective Startup.
4. Under Selective Startup, click to clear the Load Startup Items check box.
5. Click the Services tab, click to select the Hide All Microsoft Services check box, and then click Disable All.
6. Click OK.
7. When you are prompted, click Restart.
To return your computer back to normal boot:
1. Click Start on your Desktop
2. Type msconfig in the Start Search box and then press ENTER.
If you are prompted for an administrator password or for a confirmation, type the password, or click Continue.
3. Click the General tab.
4. Click Normal Startup - load all device drivers and services, and then click OK.
5. When you are prompted, click Restart to restart the computer.
For information on using “Clean Boot”, see the following Microsoft Article:
http://support.microsoft.com/kb/331796
Step 2:
Once you finish with the clean boot from safe mode, you can try to boot in normal mode. If that doesn’t help then you can do a system restore.
Step 3:
Run a virus scan as well on your computer to check if your computer is infected