Answer:
Virtual memory is where the computer uses part of the hard drive to store items that should be in memory but there is not enough space.

You can set the size of the virtual memory or you can allow Windows to determine the best size. I suggest letting Windows determine the size. Microsoft does also by oddly ships Windows set to user set size.

To change the size or to allow Windows to determine size do the following:
In the Start Menu, right click on Computer or My Computer. Choose Properties. In Windows Vista or 7 choose Advanced System Settings on left, then we are at same place as Windows XP.

Click the Advanced tab, click Settings button under Performance, choose Advanced, click Change button under Virtual Memory. My suggestion is then choose System Managed Size or you can set a size. Click the Set button. Now close the boxes and you will probably have to re-boot (re-start) the PC for the new settings to take affect.

If you already have it set to system managed sized and are getting warnings about low virtual memory then you need to add memory to your computer which come on little sticks/circuit boards that are plugged in the mother/main board of the computer

Thanks to Rodney for this week's question

Send me your questions about computers to me at the paper or to my e-mail dwight@dwightwatt.com and tell me you read this in the paper. I will pick a question to answer each week.