Ottys, на разделе реестра HKEY_CLASSES_ROOT правой кнопкой мыши -> Разрешения -> кнопка
Дополнительно -> покажите.
И на эти ветки проверьте:
Код:

HKCR\.aw
HKCR\.csv
HKCR\.docm
HKCR\.docx\PersistentHandler
HKCR\.docx\ShellEx\{BB2E617C-0920-11D1-9A0B-00C04FC2D6C1}
HKCR\.dotm
HKCR\.dotx
HKCR\.msg\PersistentHandler
HKCR\.odp
HKCR\.odp\ShellEx\{8895b1c6-b41f-4c1c-a562-0d564250836f}
HKCR\.ods
HKCR\.ods\ShellEx\{8895b1c6-b41f-4c1c-a562-0d564250836f}
HKCR\.rtf
HKCR\.vdx\PersistentHandler
HKCR\.wbk
HKCR\.wiz
HKCR\.xlam
HKCR\.xlsx\ShellEx\{BB2E617C-0920-11D1-9A0B-00C04FC2D6C1}
HKCR\Acrobat.Document.11
HKCR\AdHocReportingExcelClientLib.AdHocReportingExcelClientAddIn.1
HKCR\AdHocReportingExcelClientLib.AdHocReportingExcelClientAddIn.1\Clsid
HKCR\excelmhtmlfile\DefaultIcon
HKCR\ExcelPlugInShell.PowerMapConnect
HKCR\ExcelPlugInShell.PowerMapConnect
HKCR\ExcelPlugInShell.PowerMapConnect\Clsid
HKCR\ExcelPlugInShell.PowerMapConnect\Clsid
HKCR\Inquire.InteractiveDiagnosticsAddIn\CLSID
HKCR\mapi16
HKCR\MSDMine
HKCR\MSOLAP
HKCR\MSOLAP110ErrorLookup
HKCR\MSOLAP110ErrorLookup.1
HKCR\MSOLAPUI110.ConnectDialog
HKCR\MSOLAPUI110.ConnectDialog.1
HKCR\NativeShim.InquireConnector.1
HKCR\NativeShim.InquireConnector.1\Clsid
HKCR\NativeShim.InquireConnector.1\CLSID
HKCR\PowerPivotExcelClientAddIn.NativeEntry.1
HKCR\PowerPivotExcelClientAddIn.NativeEntry.1\Clsid
HKCR\powerpointmhtmlfile\DefaultIcon
HKCR\Word.Document\CurVer
HKCR\wordmhtmlfile\DefaultIcon
HKCR\XEV.OriginalApp