You should try disabling DEP (Data Execution Prevention)
1. Click Start
2. Select Control Panel
3. Select System
4. Click the Advanced tab
5. In the Performance region select Settings
6. Click the Data Execute tab in the dialog box that opens
7. Select Turn on DEP for all programs and services except for those I select
8. Click Add to add your bt client
9. Click Open
10. Click Apply
11. Click Ok
12. Reboot
Hopefully this works out for you.
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