Computer dramatically slow with Vista

Hi,
I installed Vista on my PC (ACER Aspire T120E-S965 with AMD Sempron(tm)
3000+ 2.00 Ghz and 1.00 Go RAM).
After trying more than 10 times, it seems to be finally stable but it is
DRAMATICALLY SLOW!!!
I'm glad I chose to install it on a second partition, using dual-boot
because I couldn't use it for my general work in such conditions.
With XP, it works just fine (so I don't believe my computer is responsible).
I also installed Vista on my notebook which doesn't seem to suffer the same
problem.
The major difference between these two installations is that I activated
Windows Vista on the slow machine and not yet on the notebook.
Any explanation?
Thank you

 

Is it doing a lot of disk activity or struggling for memory?

 

Hi Mac,
Thanks for joining me for this problem.
No, the disk doesn't seem to be more involved than when using XP.
The computer seems just to "hang on" (doing what?)
For example, if I open Internet Explorer (with just "about:blank" as the
address) it takes more than 20 seconds to open. Any program takes much more
time to load than the same program with XP. That's what I call slow.

Jean

 

Are you running the Aero features?

 

No, I disconnected Aero features.
And, thinking about it, the disk is working more than for the same
operations in XP

 

You could try to switch off services you don't need. I suspect indexing may
be slowing you down at this time, background defrag too maybe. Have a look
in Task Manager to see what is running and have a look here...

http://www.blackviper.com/WinVista/servicecfg.htm

 

Thanks, Mac, I'll do that and I'll let you know if it worked.
Talk to you later.

 

Hi Mac,
I've gone to the site you suggest me to look to.
It helped.
I haven't read or applied all the changes it suggested but my computer isn't
as slow as it did.
Thank you for your help, I appreciate.