Determine Whether 32 or 64 bit

[AlanHo]

I installed Windows 7 Home Premium using the 64 bit installation disc on my computer which has an Intel Q9650 cpu and 8 Gb of DDR2 1066 RAM.

However - opening Control Panel > System the information shows that I have
8 GB RAM installed (3.25 usable)
32 bit operating system

How can that be - I definitely used the 64 bit Windows 7 installation disc (latest retail version).

 

[davehc]

There are some unoffical versions available with both on the same DVD. In this case, you may have put in the wrong key.
Otherwise, if you are using a genuine retail version, then,
1. You used the wrong DVD or,
2. The DVD's are incorrectly labelled.

 

[clifford_cooley]

If you look under Computer Properties which version does it say you are using?

Control Panel >> System and Security >> System
"Windows Logo + Pause" will also take you there.

Look under System and then System Type

 

[davehc]

I think that is where he looked and found the "32Bit" version?