The size of your page file is dependant on the type and number of applications that you run simultaneously. Windows will typically manage the size for you which is the default configuration. If you have your page file set to a specific maximum or you manage your page file manually then you will need to monitor your memory usage. If you start to run into memory problems then you need to increase the size of your page file. Opal Software Solutions recommends as a minimum 512Mb combined memory and page file size. This is an absolute minimum with the ideal size being in the 1024Mb range. This leaves additional memory available to safely run other tasks while doing a large download.