下载什么都删除或者无法下载
[HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionPoliciesAttachments] "ScanWithAntiVirus"=3 改成"ScanWithAntiVirus"=1
或者
reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Attachments" /v "ScanWithAntiVirus" /t REG_DWORD /d 1 /f