Note on archived topics.
You can upgrade to a 64 bit operating system as your hardware can support it.
However, I wouldn't do it if I were you as your PC can only take a maximum of 2 GB of memory.
That must be a BIOS limitation as the chipset in your PC can recognize up to 8 GB of memory with a 64 bit OS..
A 64 bit OS needs more memory to run than a 32 bit OS does, so there would be no benefit to you installing a 64 bit OS with only 2 GB of memory.
IMO, your performance would actually suffer a little over a 32 bit OS running 2 GB of memory.
There would be no difficulty installing a 64 ibt OS as your PC's support page has 64 bit drivers available. Most if not all of the Vista 64 drivers will work with W7.
My rule of thumb is to never install a 64 bit OS unless you have at least 4 GB of memory installed.
You're very welcome.
Most, if not all of the software you have on Vista would work with Windows 7 64 bit.
A 64 bit OS can run 32 bit programs.
It is the lack of installing more than 2 GB of memory in your notebook is what would prevent me from going to 64 bit.
You may want to consider upgrading to W7 32 bit, which would work fine. The retail box upgrade version of W7 has both a 32 and 64 bit installation disk.