Built in blue tooth not working for sony notebook windows 7

Can you help me please.
I added a laser mouse to pc and it worked fine now all of a sudden its crashed and my pc cant connect to it yet the mouse does connect to other pcs tried in a shop.
Blue tooth settings is not coming up when i click on it either.
Drivers are saying all is ok.Very confusing.
Is there any way I can fix this please xx
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More about built blue tooth working sony notebook windows
  1. Using system restore, try to go back to a date when everything was working fine.
    To find System Restore, just click on Start and type System Restore.
    Hope that helps!!!
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