i only have two hundred dollars and want to get a blank computer and install leapord i would like around 40gb hardrive 512mb-1gb ram and 1ghz proccesor.

Windows XP Product key?

MY computer recently crashed and went to a repairguy. ( A friend of my dad fixed it) Now since the computer crashed he put a new hardrive and basicly most of the files are missing. So i was trying to reinstal Mcafee and IT said my software product(windows) is out of date and need to be updated. So i go on windows updater and it says my product is not genuine.
I go on my computer and i click properties and i see the Registered to: section got changed and had the repair guys name. SO now the PRODUCT KEY IS CHANGE AND WIndows thinks its now a fonny any ideas on what to do

hey everyone im trying to fix my familys desktop computer..it seems to be running quite slow this past year
the computer is a
Emachines T2895
120gb hardrive
512mb RAM
Windows XP

i currently run ccleaner, auslogics disk defrag and registry cleaner, and avg free, also malwarebytes anti malware…

what programs or settings should i change to speed up the computers performance? help

So here is the deal. Apparently, my computer is supposed to be "the fastest one in the house" (according to my dad). But when I was younger, I downloaded Limewire, And all sorts of different fonts and cursors from sketchy websites (I was young and stupid apparently).
Now, my computer is really slow. It takes about 15 mins to boot up, and it takes about 10 seconds to just respond to my clicks.

I have removed Limewire since then, and tried to get rid of all of the fonts and stuff, but that hasn’t really helped much.

I have Spybot and Symantec to get rid of spyware and viruses, but it is still so slow.

I would ask my dad, but I don’t want him to know that I had Limewire. >.<

Is there a software I can buy that can help me fix it? Or should I just buy a new hardrive and start over?

Thanks!

Registry cleaners……..?

Are there any free registry cleaners? Will they improve processing speed? I have a Pentium III, 512mb RAM, and 80 gig hardrive with about 45% used. Processing is slow of late.