I suppose you could start by checking here
Control Panel\All Control Panel Items\Language\Advanced settings
You should see a link in the middle "Change language bar hot keys"
And at the bottom a link that says "Restore defaults"
This is assuming you didn't use AutoHotKey or another third party program to swap the default keyboard shortcuts.
Hey Trouble, thanks for your prompt response.
I checked in Control Panel\All Control Panel Items\Language\Advanced Settings where i found the 'Change Language Bar Hotkeys' and at the bottom I found and clicked the 'Restore Defaults'
Pressing the 'Change Language Bar Hotkeys' brought up a window where the Here the 'Key Sequence' 'Between Languages' is set to Ctrl + Shift, however, when I try them in a Word .doc, nothing happens. The only way to change input language is the WINKEY + TAB !
I also checked my Downloaded Programs but cant find any Hotkey third party program.