|You should consider downloading SpeedyPC Pro, it's definitely more effective than CCleaner. It's unlikely that you'll notice anything significant change after using CCleaner, after all, it is free and ultimately your getting what you pay for. |
You could also consider doing a restore installation of windows xp, you won't lose anything in the process, and your system is guaranteed to run faster.
You could also run system file checker, which will rebuild all dll files on your system; simply run command prompt and type in 'sfc.exe /scannow' and put your windows xp cd in and it will run through.