[LTR]You have to restart in "Safe Mode, Command prompt only". Once you do this, you can run regedit. After opening the editor, drill down to the this location and place these entries there.
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.exe]
@="exefile"
"ContentType"="application/x-msdownload"
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.exe\OpenWithProgids]
"exefile"=hex(0):
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.exe\PersistentHandler]
@="{098f2470-bae0-11cd-b579-08002b30bfeb}"
After you set these in the registry, you can exit and restart.
[/LTR]