The R400/T400/T500/W500 with Win 7 is not prompting to install SP1. When checked in Systems at Control Panel. It does not show that Service Pack 1 is installed.
Ensure drivers have all been updated via Lenovo Support site
Graphic card driver must be version 8.792.5-110424b-119200C-Lenovo and above.
Version 8.792.5-110424b-119200C-Lenovo Switchable Graphics driver available below.
Software name ThinkPad Switchable Graphics Driver Support models ThinkPad R400 ThinkPad T400 ThinkPad T500 ThinkPad W500 Operating Systems Microsoft Windows 7 32-bit, 64-bit Refer to marketing materials to find out what computer models support which Operating Systems. Version 8.792.5-110424b-119200C-Lenovo Support devices ATI Mobility RADEON HD 3400 Series ATI Mobility RADEON HD 3650 ATI Mobility FireGL V5700 INTEL GM45
<8.792.5-110424b-119200C-Lenovo> - (Fix) Fixed as issue where MSN Live Messenger 2011 did not respond when Switchable Graphics changed to Energy Saving mode with Windows 7 Service Pack 1 installed.
Please note that this is a temporary link and will be updated when the driver is posted on the Lenovo Support site.