guys what does it mean that (your computer has low virtual memory) is there any problem and hoe to slove it?

When I used to use Windows XP I used to face this problem.
Now I don't know any technical thing about it but the only solution I found was to restart my PC.
And what meaning do I take from this is, the computer background programs have consumed all your RAM and there's nothing left for other programs to run.
I did not find any solution to this except restarting the computer.
Over to some more technical members.

the solution of this problem is that increase your RAM....

when there are lot of program running at a time than such messages will pop up....may be you are running lot of programs or you have opened lot of tabs while you are browsing...

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Regards,
~ Riz ~

This behavior may occur if you try to strt any of the programs included in Office on a computer where the paging file value setting is too low.

Windows XP
Click Start right-click My Computer, and then click Properties.
In the System Properties dialog box, click the Advanced tab.
In the Performance pane, click Settings.
In the Performance Options dialog box, click the Advanced tab.
In the Virtual memory pane, click Change.
Change the Initial size value and the Maximum size value to a higher value, click Set, and then click OK.
Click OK to close the Performance Options dialog box, and then click OK to close the System Properties dialog box.

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You Are The Only Exception

I think you C: drive is conjested. Usually drive C: is used for the storage of page file so keep this drive as much as free (space wise) or transfer the paging to another drive that has more free space.

I assume that you got a little balloon in the bottom right-hand corner announcing that your virtual memory is low and that Windows is adjusting it. If this happens just once, don't worry—as the message said, Windows found a problem and fixed it. But if it happens repeatedly, it could be that your settings don't allow Windows to make the necessary adjustment. First, make sure your drive isn't overly full. In Windows Explorer, right-click the drive icon and choose Properties. If the amount of free space is under about 10 percent, you'll need to free up some space. You can use the Disk Cleanup button right next to the free space indicator, or manually move some files to off-line storage, or uninstall unnecessary applications—whatever it takes to get more free space.
If low drive space isn't the problem, the virtual-memory settings may be wrong. Right-click My Computer and choose Properties. Click the Advanced tab. Click the Settings button in the Performance panel. Click the Advanced tab in the Performance dialog. Click the Change button in the Virtual memory panel. or bs hogya! This setting is buried quite thoroughly! Look for the System managed size option, select it if it isn't already selected, and then click OK That should end the warnings.

Hope i replied the query technically upto satisfactory level.

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Its not the size of the dog in the fight that counts.
Its the size of the fight in the dog.

You have to increase RAM capacity of your system. Besides this you have to delete extra unnecessary files which have taken extra place to your PC virtual Memory. The programs which you are not using Currently should be removed.
Note. This problem decrease the Speed of system while using Internet.