Our system first goes into 'repair' or 'normal' mode option screen, then boots into the 'repair' mode and eventually hangs before logging in all the way. The screen just hangs with a Windows 7 style blue screen with wispy lines and green branch and a white bird off to the mid right of the screen.

SOURCE: Blue Screen of Death

You'll need to setup the Acer laptop to boot from CD-ROM. Push either the F2 or F10 button when booting your laptop and it should bring-up the configuration management interface. Go through the options and confirm that Boot From CD-ROM is at the top of the list on bootable devices.

Next, you'll need your original Windows XP CD that came with the Laptop. Put it in the CD-ROM Drive and reboot your laptop. You will be given two options: 1) Re-install Windows or 2) Repair the existing Windows Installation. I recommend that you repair the existing Windows Installation as this will not destroy and data or device drivers that are install on the laptop.

Good Luck!

SOURCE: when trying to boot up

Hello

So in that case you need to reinstall the Windows so that it will fix the problem. Some instances of that problem corrupted Operating System it needs a new copy.

Regards
PCmania

SOURCE: I have an acer aspire 5315 and on start up it goes

This can be caused by a hardware failure (e.g. hard drive, etc.) or an operating system (OS) issue. Either way I would recommend taking it to a computer repair shop so they can diagnose the issue.
If its an OS issue most likely the cheapest way to fix it will be reloading the OS on a new hard drive(because its cheaper to buy a hard drive then have a company backup your data) then plug in your old hard drive to get access to your data.

SOURCE: Acer 110 boot problems

This could majorly happen because of sp3 conflict with one of your hardware drivers
log in into safe mode and rollback the last software or hardware driver update

SOURCE: netbook will not boot up

choose to boot from safe mode. check if it will proceed. if so, you should reinstall your operating system. if it still wont boot to safe mode then you should replace your hard drive.