If you do not already know, pagefile.sys is your swap file. It makes common sense to put it on a hard
disk that is fastest. So say if you have upgraded you machine and a newer and faster harddisk, change
the pagefile location to that drive. Open registry and navigating to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SessionManager\
MemoryManagement and then looking for Paging files Change its drive location (on mine its says
C:\pagefile.sys) to the one that is faster (say D:\pagefile.sys if D: denotes the faster drive).