I'm not sure whether Windows 7 supports the Intel Mobile 945PM Express Chipset natively, in case it doesn't, you'll need the Intel Chipset Device Software. The Intel Driver Update Utility will probably tell you whether you need the Intel Chipset Device Software:
http://www.intel.com/p/en_US/support/detect
If you need it, the Intel Chipset Device Software should be installed directly after installation of Windows 7 and its latest service pack and before installing any other drivers.
From Intel's Readme:
"The Intel(R) Chipset Device Software installs Windows*
INF files to the target system. These files outline to
the operating system how to configure the Intel(R) chipset
components in order to ensure that the following features
function properly:
- Core PCI and ISAPNP Services
- PCIe Support
- IDE/ATA33/ATA66/ATA100 Storage Support
- SATA Storage Support
- USB Support
- Identification of Intel(R) Chipset Components in
the Device Manager"
"This software is designed for the latest Service packs
releases of above operating systems."
"7. It is recommended that the Intel(R) Chipset Device Software
be installed onto the target system prior to the
installation of other drivers."
Intel Chipset Device Software for T60 2623:
http://support.lenovo.com/en_US/downloa ... MIGR-73684
Intel's Readme file:
http://downloadmirror.intel.com/20019/eng/readme.txt
You should also install Lenovo's System Interface Driver before installing other drivers. It's part of a driver package called Hotkey Features Integration:
http://support.lenovo.com/en_US/downloa ... MIGR-74261
It's probably not a good idea to install the Intel Chipset Device Software after having installed other drivers. If you have done so, be prepared to wipe the OS and re-install Windows 7.
Lenovo's instructions for installing Windows 7:
http://support.lenovo.com/en_US/guides- ... D=UM001926