Trouble starting up. Nashville, TN

I installed the windows 8.1 update and since I attempted to install it, the computer won't start. It gets to the home screen but no where else.
Services Requred
Operating System Support, Computer Repair & Maintenance, Laptop Repair, New System Setup
Estimated Budget
$75
When to Start
Immediately
Contact Information
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E-mail Address (available)
Phone Number (available)
Best Time to Call (available)
City Nashville, TN
Zip Code 37209
Address (available)
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