Dell 305w Wireless Printer Can Print But Not Scan Wirelessly

My operating system is Windows 7 Professional 64-bit. I recently bought a new laptop (not a Dell) and so wanted to link this up and synchronize it with my Dell 305w all in one Wireless printer so it prints and scans wirelessly. I put in the CD that came with the printer and I downloaded the most recent driver (or so I thought). Anyway, after all that was done it prints wirelessly no problem. The trouble came when I wanted to scan a document from the Dell Imaging Toolbox. On my old laptop (that is a Dell) and my daughter's laptop (that is a Samsung,) this works wirelessly no problem at all from the Dell Imaging Toolbox.

On this new laptop, it doesn't scan wirelessly although it does print wirelessly. Every time I tried, first a message came up giving me a choice of two printers to use yet only one is showing in Devices and Printers in the control panel. So I chose one. (This message never came up before on my other laptop and I never had a choice). After choosing one, I then chose 'scan' and then 'start' from the Dell Imaging Toolbox. This then brought up another message that was titled, 'Network Scan.' 'For best results when scanning over the network:

- Save all your work.
- Close Dell Imaging Toolbox.
- Press the Scan button on your printer's operator panel.

I need to have it working wirelessly from a remote spot as it did with my previous laptop because I am disabled. How to rectify this scenario? What am I doing that is stopping this from scanning wirelessly? On top of that also related to the printer, every time I boot up the laptop, a message appears saying, 'Microsoft.NET Framework Version 2.0 is required to continue. This software is available for free at - Microsoft website address.' I've gone to the website and downloaded this twice but the error message still keeps coming up every time I boot.