Avast 5 Internet Security slows down my pc

I am using avast internet security 5 my system spec are -

1- intel core 2 duo e7500 2.93 GHz
2- 2 gb ddr2 ram
3- windows xp professional 32 bit sp-3
4- nvidia geforce gt240 1gb ddr3

after installation of avast everything goes fine but when i open my computer system freezes for 5-6 sec but mouse moves

with same spec in (windows 7 ultimate 32 bit) everything works fine.

please help me :cry:

On your XP-P machine (#1 machine), how many things do you have running at Start Up? Are there any items that are unnecessary that you can ā€œDisableā€ (not delete)?

When you say that your machine ā€œfreezesā€ for 5 - 6 seconds, are things loading up at this time?

You can also always go to the Avast GU > Settings > Troubleshooting > click on ā€œload Avast services only after loading other system servicesā€ to see if this helps.