Your modem (or other connecting device) is not functioning.

Cannot allocate memory.

Windows memory error, possible memory leak.

1) What other applications are open? if you don't need all the applications open, close some of them. Find the application that's eating up your memory or the application with the memory leak, and look for solutions from the support site for that application.

2) When's the last time you rebooted your PC (windows95 era, happened all the time if you left your PC on all week without rebooting).

3) Give the PC a break, reboot, grab a coffee and try again.