Anti-virus software?

Which is the best antivirus software to put into my computer. Have read that Macafee make the computer slow to run after installation. I am also getting an MSN report saying that my virtual memory is low. Not to into computer jargon so can you explain in simple language

Cheers

Anti-virus software?hijackthis

If you are looking for a simple yet good antivirus I would try AVG-free version. I use it on a few of my computers and never have had any problems.

When all of your computer's real physical memory (RAM) is in use, Windows will try to create virtual memory by grabbing a chunk of hard drive space and treating it like real memory. Your software can't tell the difference between real and virtual memory, but you might because virtual memory access is much slower, due to the hard drive activity it requires.

If you encounter the low virtual memory error message, then you have used the maximum amount of real plus virtual memory that is supported on your system. Sometimes programs that crash or ones that are poorly designed will not return their working memory space to the operating system when they're done using it. Other programs that need a large amount of memory to run may fail because Windows cannot "see" the available memory. In most cases, a shutdown and restart will resolve this problem. you still see the dreaded "Your system is low on virtual memory" message then the first thing to do is make sure your computer is configured to allow Windows to automatically manage the virtual memory. In Windows XP, follow these steps: