how to fix insufficient virtual memory?

Which operating system are you using?

Control Panel -> System -> Advanced -> Settngs(Performance)-> Advanced
tab -> Change

and chane Max memory to ur RAM x 4
Min mmeory RAM x 3

Windows NT-Based Computer
1.	Click Start, point to Settings, click Control Panel, and then
double-click System.
2.	Click Virtual Memory, set the "Initial Size" and the "Maximum Size"
values for the paging file to 0 (zero), and then restart your
computer.
3.	Click Start, point to Settings, click Control Panel, and then
double-click System.
4.	Click Virtual Memory, reset the "Initial Size" and the "Maximum
Size" values to the recommended values for Windows NT, and then
restart your computer.
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Windows 2000-Based Computer
1.	Click Start, point to Settings, click Control Panel, and then
double-click System.
2.	Click the Advanced tab, click Performance Options, click Change,
set the "Initial Size" and the "Maximum Size" values for the paging
file to 0 (zero), and then restart your computer.
3.	Click Start, point to Settings, click Control Panel, and then
double-click System.
4.	Click the Advanced tab, click Performance Options, click Change,
reset the "Initial Size" and the "Maximum Size" values to the
recommended values for Windows 2000, and then restart your computer.