Internet Explorer 11 Change the downloaded file name, replacing all the dots (.) with underscores (_)

Disable the "Restrict File Download" policies:

Source: Event 1028 - Automatic Download Blocking

• Open Group Policy Editor (gpedit.msc):
• Expand Computer Configuration and disable any policies under:
  Administrative Templates >> Windows Components >> Internet Explorer >> Security Features >> Restrict File Download
• Expand User Configuration and disable any policies under:
  Administrative Templates >> Windows Components >> Internet Explorer >> Security Features >> Restrict File Download

Also, check the following registry paths for a DWORD value iexplore.exe. Change the value to 0 or delete the value:

• HKLM >> Software >> Microsoft >>Internet Explorer >> Main >> FeatureControl >> FEATURE_RESTRICT_FILEDOWNLOAD

• HKCU >> Software >> Microsoft\Internet Explorer\Main >> FeatureControl >> FEATURE_RESTRICT_FILEDOWNLOAD

Finally, ensure that the "Do not save encrypted pages to disk" setting is not enabled for all users. Add the DWORD value BypassSSLNoCacheCheck and set to 1 under the following registry keys:

• HKLM >> SOFTWARE >> Microsoft >> Windows >> CurrentVersion >> Internet Settings
• HKCU >> SOFTWARE >> Microsoft >> Windows >> CurrentVersion >> Internet Settings