No all of the cameras are compaible with win7.
But you can try this.
Connect the camera to the PC with the USB cable comes with the camera
Go to Start>control panel>hardware and sound, if you see "Device manager" go to nect step>device manager>portable devices> your camera or it show other device> use mouse point to it and right click, you will see one small window pop-up> click the "Scan for hardware changes". Then you should see your camera, now you can select to download the pictures or open device to view files.