Windows uses virtual memory as a swap space when it runs out of physical memory. Virtual memory resides on the hard disk, and if you have it set correctly, the only time you will get this message is if your hard drive is running out of space. The more physical memory (RAM) that you have, the less likely it is that Windows will need to swap to virtual memory. You have 128 Mb of real memory which most people would consider to be a tiny amount these days. Upgrading to 1 Gigabyte wouldn't cost much and would vastly improve the performance of your system. But you also need to check how much space is left on your hard drive as that may be the immediate cause of the messages.