1.61 i think is the number you're talking about Nut
A number of things could be causing the laptop to run slowly. Like the guys have said, you have Memory, Viruses, amongst other things. I haven't run a windows box for about a year, however..... I found this page which may assist to speed it up for you.
Apologies, doh! tiredness is setting in. :)
Similar fixes though for XP as in Vista. :)
Most of the machines run slowly due to the Registry, with installation of programs and removal :)
Ignore the first link... and try this one...