Virtual memory. My Packard Bell Pc is 4-5 years old. P/N P660403401. The monitor goes blank every

Question

My Packard Bell Pc is 4-5 years old. P/N P660403401. The monitor goes blank every few minutes. I switch it off for 5-10 minutes then it works again for maybe 5 minutes before going blank again. A pop up appears on the task bar saying that there is not enough virtual memory and windows is doing something to increase the memory paging file but it hasn't improved and my Pc is running very slowly. I am unsure as to what to uninstall or how to do it, to increase memory as there may be something running in the background that I'm unaware of. What can I do to fix this problem as it has gone on for a long period of time?