I’m not quite sure why your fans don’t work after the Win 7 installation but I would recommend checking the BIOS firstly.
It seems that the latest available BIOS for this series is BIOS v4.80-WIN
If you don’t have the latest BIOS installed, try the update.
Furthermore I recommend installing the VAP (value added package) and the drivers like chipset utility.
Toshiba Satellite P105-SP6022 PSPA6U seems to belongs to the Toshiba US series but you can also visit the Toshiba European driver page to get the drivers for Satellite P100 PSPA6E series… this is the same series like the US series PSPA6U.