Same issue here.
Paged file size ~1G, pre-reboot. (<100M post)
Conducted cleanup of drives, cleared nearly 1G each. (additional)
Already had PagedPoolSize registry setting change in effect.
Added IRPStackSize setting to value 18 decimal.
My guess is size of paged file was too close to system limit and reboot of server alone would have corrected the problem. Good excuse for some housekeeping though, until after working hours when a reboot could take place. Also, mod of IRPStackSize nominal in effect, and would push problem off longer next time.
Started this post pre-reboot.
Problem is now fixed.
Perhaps this will help someone else!