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Welcome
You could read and try what is indicated in this tutorial
Gadgets - Restore Default Gadgets
If that does not work you can try and sfc scan
SFC /SCANNOW Command - System File Checker
Run 3 times if errors are found.
If that does not work a system restore from, at least, a few days before the virus.
System Restore
I found the answer.
Source :use regedit and delete this derictories:
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\
then restart sidebar process.
I think, problem in last adob flash player update.
https://www.sevenforums.com/1069596-post11.html