I know that there are 2 types of OSs, 64 bit and 32 bit What is the main differences between them?
And if I am buying a new laptop, which one should i install?
It will be able to run all applications if I installed either of them?
I am talking mainly about windows Operating systems, but you can answer about others as well.
Answer
mainly the amount of RAM accessible. In most 32bit OSs there is a 4gb (closer to 3gb actually) ceiling. I believe vista x64 can access up to 128gb.
Realistically, unless you're a power user it won't matter. Very few activities you'd do on a daily basis will require more than 3gb of memory. Also, driver support for 32bit OSs is slightly better.
64bit apps will not run in a 32bit environment. However, you probably won't find very many apps that are exclusively 64bit. 32bit apps will run fine 99% of the time in x64.
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