My PC Says "Virtual Memory Too Low"

This happened last night as I was uploading photos from our trip to Paris, France. There was a pop-up in my computer that says "Virtual Memory Too Low". I don't know exactly what is this or what's going on. As this happened, I had a lot of windows from the different sites I visited. I also had a lot of programs running. Just now, I tried to search it in Google and find some answers from yahoo. For those who experience the same thing, these are the possible causes, suggestions and solution which I just found now in yahoo. here they are for your infos;

"Go to Start
Settings
Control Panel
System
Advanced
Performance settings
Advanced and under Virtual memory you set it to 2x or 3x your ram size. It really doesn't matter how high you set it but it does matter if it is too low.

What is means is that it will use some of your hard drive space as virtual ram when an application needs it usually when it's exhausting your real ram. Optimally would be to have more ram in your system since the hard drive is a lot slower than real ram

Also Defrag your computer once a month at least

Start
Programs
Accessories
System Tools
Defragmentation

"Usually running out of virtual memory means that you are running too many applications at the same time for your system or one of them is attempting to use too much memory.

Increasing virtual memory is one way of compensating for lack of RAM. However, it's optimum should be set at 1.5 times the amount of RAM on your computer. Virtual memory can be increased, but it comes with a risk if you increase it too much as it can eventually lead to hard drive damage.

To increase VM on Windows XP (should be in similar locations for other versions) look in Control Panel: System, Advanced, Performance Settings, Advanced, Virtual Memory.

You can see if your computer can handle more RAM at http://www.crucial.com/index.asp

It's important to note that everything takes RAM. Not only security products (such as active anti-spyware, anti-virus and firewall) eat up memory but your operating system, active browser windows, running applications (such as Word, Gaming, Messenger, Photoshop, etc) and malware all compete for system resources. The presence of Malware (viruses, spyware, etc) will particularly eat up your system resources so you may want to run your resident security products such as antispyware and antivirus applications to ensure that your system is clean.
source: http://answers.yahoo.com/question/index?qid=20080802071545AAEyqYF