Try:
1
Open Registry Editor by typing regedit in Start Menu search box or press + R and typeregedit.
In the Registry Editor, navigate to:
HKEY_CURRENT_USER > Software > Microsoft > Windows > CurrentVersion > Explorer
In the Explorer folder ("subkey"), create a new DWORD value, named AltTabSettings.
(Right-click > New > DWORD (32-bit) Value).
Double-click the newly created DWORD value, change it's value to 1 instead of 0, and chooseHexadecimal.
Press OK, and enjoy the classic Alt-Tab feature.
2
Another option would be to use the software Switcher.
- Requires Aero enabled.
- More informations read this
Not a fix, a replacement.
This might do it: http://insentient.net/