I have a very strange problem with my fresh install of Windows 7 Profesional, 64bits on my Lenovo Thinkpad T61 :

The overal performance is very slow, the disk is constantly spinning, even without any program running (after boot, no other programs installed).

The boot process is very slow itself (4-5 minutes).

I mention that the laptop was fine on XP until the upgrade.

Thanks !

Additional info (as requested by the comments) :

• 2GB RAM
• Yes, I added all the manufacturer (Lenovo) drivers and updates (using the utility provided by Lenovo)
• Tried with both 32 and 64 bits editions. The 32 bits one is performing a little better, but not very usable either.
• The hdd has enough space (20 GB or so)
• The problem is still present on a fresh install, so no recycle bin emptying or unistall programs (there aren't any except plain 7) would help. I'm not a newbie, so no obvious causes are left unchecked