Satellite A210-16G - CPU and memory frequency problem

Hey guys,

I've had a problem with my notebook that I can't solve, since I've installed windows 7 RTM x64 version.
I've noticed that something's wrong after finding out that my Windows Experience Index has dropped to 2.7 instead of 4.5, I used to have on Vista. For those who don't know my specs are:
AMD Turion 64 X2 TL-60, for which I've got 2.7 rating, 4Gb Kingston DDR2-667 (333 MHz) - 4.4, scores of graphics and hard-drive are the same.

I've read at the one of forums that it can be an issue with power saver options, but it hasn't got any option which says about processor frequency changing according to power plan. I've also installed new 2.0 version of BIOS from Toshiba web-site, but it only made things worse: I've got 6.0 rating of gaming graphics but Desktop Perf for Aero has dropped to 1.0!

I've installed some diagnostic software: Everest and CPU-Z and I found out that my CPU works with frequency of 800Mhz (multiplier is 4x , voltage 0.8V) and my DRAM frequency is 159.8Mhz (I don't know if it's ok, but I know that 4.4 score is definitely too low though ).

So tell me guys, is this an issue of operating system? Should I try to install Windows 7 32-bit version, or it won't change anything? Or maybe I should try some software that would change the frequency of my FSB?
I'm looking forward to your answers because I don't know what to do.

Paul