Hello Davis10, Link Removed - Invalid URL to Windows 7 Forums,
Place your Windows 7 DVD in and boot to the "System Recovery Options" screen and select "Startup Repair", this will
scan your computer in an attempt to find and fix any startup problems.
There's also the possibility of having to do this more than once.
Once you've been able to get back in to Windows, I would run a few malware/virus scans, using Spybot-Search & Destroy, MSE and Malwarebytes, running them 1 after the other of course, to make sure your machine is not infected.
Hope this helps
Don