Context Menu slow to open

When right clicking on files, and opening them, there typically is a delay of about 30 seconds. This doesn't happen with folders or executables. This is a common problem but I didn't find the answer anywhere.
Anyone have idea ?

Thanks

If your context menu (the menu appearing when you right click) is slow to appear (open) then you need to change the MenuShowDelay setting.
In RegEdit go to HKEY_CURRENT_USER\Control Panel\Desktop and fine the MenuShowDelay value. If it does not exist create a new string value and name it MenuShowDelay. The default setting is "400" lower it, or try setting it to "200".