Q. I have installed Google Toolbar, but would like to uninstall it. How can I do it? A. I guess some people like the Google Toolbar, but I'm not a big fan of superfluous Internet Explorer add-ons. Here's how to uninstall it: Click Start, Choose Settings, Control Panel. Double-click Add or Remove Programs. Select Google Toolbar for IE. Click the Remove button. Q. Thank you for your column on .SWF extensions. I, too, use Windows XP SP2 and cannot open these files. I downloaded Flash Player 9, but can't get them to open. I have a similar problem with .TXT files. A. You're halfway there. Right-click on any of the .SWF files. Choose Properties. On the General tab, click the Change button on the "Opens With" line. Scroll down and select Internet Explorer. Make sure you select the "Always use this program to open this kind of file" option. Now that you have associated .SWF files with Internet Explorer, all you need to do is double-click on the .SWF file to view it. Follow the same process with a .TXT file, and select Notepad or Wordpad. Q.I have an Intel computer, Windows XP version 2002 Service Pack 2. CPU: 2.4 GHz, 22 MB of RAM. Every few weeks, I get a message that says I am low on Virtual Memory but Windows will increase it for me. Please explain what my problem is. A. Before your computer's CPU can do any work, it needs to have the data and the instructions for the running application in physical memory, RAM. When an application's memory requirements are greater than the available physical memory or the number of running applications exceeds the capacity of physical memory, the memory manager must take parts of physical memory and temporarily write them to disk (called paging) to make room. When the information that was paged out to disc is again required, other information in physical memory is paged out to disc before those contents are brought back in. Paging physical memory in and out to disc is referred to as virtual memory. Excessive paging will slow your system. You wrote that you have 22 MB of RAM (memory). You probably misread those numbers, as 22 MB would be far from sufficient to run the operating system. You probably have at least 256 MB. We'll find out. Right-click an empty spot on your task bar and select Task Manager. Click the Performance tab. Look for the Physical Memory statistics box. It will give you a total measured in kilobytes. To convert this number to megabytes, divide by 1024. In this day and age, low virtual memory warnings are rare and are usually indicative of a misbehaved program, a small amount of contiguous free disc space or having too many applications open at once. Check to make sure you have sufficient free space. A minimum of 25 percent free is recommended. The less you have, the more important it is that it be unfragmented. Now, take a look at what's running on your system at the time of the warning messages. Using Task Manager, this time the Process tab, you can see which applications are requesting the largest amounts of memory. If you click on the Mem Usage heading a few times, it will sort from top down. This may give you some good clues. Send questions to personaltech@sptimes.com or Personal Tech, P.O. Box 1121, St. Petersburg, FL 33731. Questions are answered only in this column.