The UefiPxeBcDxe module encounters a build error for IA32 arch using the latest version of VS2015: UefiPxeBcDxe.lib(PxeBcBoot.obj) : error LNK2001: unresolved external symbol __allmul The cause is line 148 in file NetworkPkg\UefiPxeBcDxe\PxeBcBoot.c. The third parameter for gBS->SetTimer() function is of type UINT64, so the multiplication should use the MultU64x32() function now. Cc: Siyuan Fu <siyuan.fu@intel.com> Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Liming Gao <liming.gao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>