The quick answer is to go into msconfig and disable all startup programs except your Anti-Virus and Anti-Malware programs.
If the problem "goes away", figure out what program you have in startup that caused the issue.
Here is a tutorial by Brink
with instructions for a Clean Startup: Troubleshoot Application Conflicts by Performing a Clean Startup
Make sure you note what changes you make so you can re-enable any programs you really need and want!