Slow Computer

Please help me with this issue.

I bought an Acer Aspire 6 cell Netbook (Window XP I believe) a few
months ago . It ran great for a few months. Now it is vey slow.

I did the following:

1. Did a run
misconfig
and deselected the programs I did not want.

( I get an error window that says:
An access denied error was returned while attempting to change a
service...
but yet it seems to deselect the software)


2. Opened Chrome and Mozilla / Firefox and cleared history, cache
etc.



But it is still very slow.

I have not added /downloaded any software to the netbook nor changed
anything.


Can anyone please suggest what I should next ?

Thanks in advance for your input,

Irfan Williams