Make sure your virtual memory is set high enough based on the number and type of GPUs you've got. The exact size required also depends on the algorithm you're using, but the very rough math is 8GB x # of GPUs. (e.g. 4 GPUs = 32GB Virtual Memory)

You can set this via Control Panel/System/Advanced System Settings.

1. On the Advanced tab in Performance section, click Settings, pick Advanced tab and click "Change" in Virtual Memory section.
2. Uncheck "Automatically manage paging file size for all drives", select a drive you want your page file on (SSD ideally), select Custom size and use the same number you calculated above for Initial and Maximum (to avoid disk thrashing/fragmented page file). As per example above, for 32GB you'd use "32768" (1024 x 32) for both Initial and Maximum.
3. Reboot to properly initialize the page file using the new settings.
4. Try the miner again.