With so little information its hard to give an answer.
Did this start before or after you upgraded.
Is your system 32 or 64 bit?
Did you do an upgrade or clean install?
If an upgrade what version of Vista and what version of Win 7
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20 groundbreaking 3D animation technologies coming to Siggraph 2017
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Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.