NIS 11 with 1G RAM?

Is it reasonable to use NIS 11 if I only have 1G of RAM?  I am operating Windows XP Pro with 1G of RAM.  My current security system uses a considerable amount of RAM and sometimes up to 100% of RAM for a long time, effectively freezing the computer.  I just have to shut down so I am looking to change the product.

 

I am looking for an internet security suite that won't be a memory hog.  I cannot add memory to the laptop.

 

I am using NIS11 on a new laptop with 4G of RAM.  So far this is working well, but I am concerned about using it with 1G.

 

Any thoughts and suggestions?

 

Thanks