To add a check FileSize>MemSize and block the attempt to copy such files.

Today, if a program tries to copy a file larger than the size of RAM - the system displays BSOD hang. Since this is a known issue, to hackfix it, I suggest to strictly prohibit the copy\move these files. It would be great before copying the file, check its size and to copy the file only if the amount of available memory allows it to copy without error. Otherwise, the functions should return an error without trying to copy is obviously not copy the file.
This decision will reduce the level of error. Instead of failing system we will get application crash (or application error).

P.S. This can be also implemented only for releases-hack.