Mandriva 2010 SLOW

I have installed 2010 free on my Dell Latitude 610 - 1GB RAM - and it is 
amazingly slow.  The CPU shows 100% load whenever I do anything and 
scrolling a pdf is almost impossible because the delay is so confusing. 
  It will no longer run Virtual Box so I have lost the easy Windows option.

I have stopped all the extras I can find (fancy cursors etc) but no 
noticeable improvement.

On 2008.1 Powerpack it was fast and handy and not even too slow running 
Win2k under Virtual Box, so 2010 is a disaster.

Could the difference possibly be caused by using Free rather than 
Powerpack? (I could pay, though work no longer justifies this, but don't 
want to waste cash as well as time.)

Can anyone offer an alternative to reinstalling 2008?

Rodney
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