|NOTE that I said in Response 3.....|
"- you don't boot from your hard drive on the other computer - the Vista operating system may not load if you try to do that - you just need to check out whether that hard drive still works and still has it's data on it."
Did I tell you to try installing it in another laptop ?
N0, because in most cases, you can only install one hard drive in a laptop, and in that case, the bios will automatically try to boot from it.
Vista won't load when you try to boot from the hard drive if the mboard hardware - main chipset, etc.- of the laptop you install it in is significantly different from the one on your computer.
The first thing you should do is to test the hard drive.
Check your hard drive with the manufacturer's diagnostics.
See the latter part of response 1 in this:
(thanks to Dan Penny for this link:)
Hard Drive Diagnostics Tools and Utilities
If you don't have a floppy drive, you can get a CD image diagnostic utility from most hard drive manufacturer's web sites, but obviously you would need to make a burned CD, preferably a CD-R for best compatibility, on another computer if you need to.
Seagate's Seatools will test any brand of hard drive.
Do the long test.
Obviously, you will need to make a bootable diagnostics disk on another computer,
OR, assuming the laptop you installed your hard drive in loads an operating system fine when it's own hard drive is installed....
remove your hard drive from the laptop you installed it in, install the hard drive that laptop originally had in it, make the bootable hard drive diagnostics disk, try it and make sure it works,
then install your hard drive in that working laptop again, boot the computer with the bootable diagnostics disk, run the long test.
If the hard drive itself tests okay, then
- you can boot the other laptop from a bootable operating system disk, e.g. a Linux CD, and copy the data on your own hard drive you don't want to lose to elsewhere - CDs, DVDs, an external hard drive, or there are web sites you can copy the data to temporarily
- you can run a Repair installation of Vista on this other laptop, which will accommodate Vista to the different mboard hardware without you losing the personal data contents you have added to the partition Windows was installed on, and load drivers after Setup has finished that Windows needs for that mboard and the other hardware devices on that laptop,
BUT - you need a regular Microsoft OEM Vista DVD, or a retail full version Vista DVD. You probably can't use an operating Re-installation DVD that may have come with your own Acer model, because , usually, it will not install (or Repair) Windows unless something on the disk detects that the laptop you're using is a suitable Acer model with an Acer bios version, and/or the mboard is a suitable model.
You CAN use an operating Re-installation DVD that may have come with the laptop you have the hard drive in now, along with the Product Key that's on that laptop, but that will not help in the long term if you can't continue to use this other laptop.
- if it isn't your laptop, or if for whatever reason you can't continue to use that other laptop, then you still need a working laptop, or another computer of your own, desktop or llaptop, to install the hard drive in.