Hi john25,
I recommend reinstalling Operating system or try a Factory reset as the Operating system is corrupt.
Refer the following links which has step by step procedure to do a factory reset:
Windows 7 PC restore: http://dell.to/11AZoyY
Windows 7 Clean installation: http://dell.to/1bNF8z3
****NOTE: Kindly backup data before following the above process.
Awaiting your response!