HP Probook 4520s with lots of problem

riders4siam

Broken In
Got this probook few months back and started failing the HDD, the dealer took it to Calcutta and bought back with the same size but with 5400rpm HDD, originally it was a 7200rmp HDD, well don't mind it. Now the new problem is that i installed a 2gb Kingston RAM x 2 with windows 7 Ultimate 32bit but the system properties shows this

*i52.tinypic.com/rwukoz.jpg

Question?
Why?
 

Krow

Crowman
You can't use more than 3-3.25GB RAM in a 32-bit OS. Yours appears to be Windows 7 x86 (32-bit). Install Windows 7 Ultimate x64 (64-bit) version and 4GB will be usable.

Check this link: Let me google that for you
 
OP
riders4siam

riders4siam

Broken In
You can't use more than 3-3.25GB RAM in a 32-bit OS. Yours appears to be Windows 7 x86 (32-bit). Install Windows 7 Ultimate x64 (64-bit) version and 4GB will be usable.

Check this link: Let me google that for you

uff! should have install the 64bit version. can i upgrade it to 64bit without loosing any installed software?
 

Krow

Crowman
I am not sure about that. The best way is probably to backup the setup files of all software and do a reinstall.
 
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