uVision 4.72.1.0 rebuilds entire project at every build

The summary says it all. I am using a project that I last used about 4 months ago and this problem didn't exist. Since then I've moved computers and installed a new copy of uVision. My old computer is...
uVision 4.72.1.0 rebuilds entire project at every build

The summary says it all. I am using a project that I last used about 4 months ago and this problem didn't exist. Since then I've moved computers and installed a new copy of uVision. My old computer is...
Why press "Rebuild all target files" in uVision it effect to Printer port?

I connect some device to printer port such as LED and when I press "Rebuild all target files" in uVision it change data on printer port Why? and can I disable this effect?
Why press "Rebuild all target files" in uVision it effect to Printer port?

I connect some device to printer port such as LED and when I press "Rebuild all target files" in uVision it change data on printer port Why? and can I disable this effect?
Rebuilding Library

I tried to rebuild halLib_large.LIB with the default project file, and the whole compiling and linking process seemed successful(no error nor warnings and a new library file is created), but the resulting...