Download solution from MegaUpload..

hi friends,

For mozilla firefox:
First go to http://addons.mozilla.org/firefox/59/
Click Install Now to install addon.
Restart FF. Tool-->User Agent Switcher--->Options--->Options
Click User Agents--->Add
Type this:
+ Description: MEGAUPLOAD
+ User Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Alexa Toolbar)

Click OK twice to finish adding User Agent.
From now, before downloading any file on megaupload just go Tools--> User Agent Switcher--->MEGAUPLOAD.

For IE:
Start/run->> type regedit -> ok
Go to: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\User Agent\Post Platform]

Note: if U use IE 7
go to: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\User Agent\Post Platform]

Right click on Post Platform > New > String Value > type Alexa Toolbar > ok

Now U can download from megaupload without error : "All download slots (..) assigned to your country (....) are in use"

have fun!

By Andy Ghaely