I finally had time on my home PC yesterday to see if I could get to the bottom of this. Indeed, I had to unplug the receiver for the mouse and use the one receiver for both the Keyboard and Mouse once I let the OS find solutions to the problem. I was so happy I actually failed to notice how/what I clicked on to "Find the Solution".
Also, I had to reinstall Roxio Easy Media Creator 9 as the initial install saw me get a prompt that "Windows has blocked a DLA driver from installing - do you want to try and fix this problem?" message pop-up. Clicked Yes. It went thru it's routine, said it was 'fixed" but whenever I opened Roxio I had a message "Drive not detected".
Unistalled, reinstalled Roxio, rebooted, got the message "Windows has blocked a DLA driver from installing - do you want to try and fix this problem?" - clicked on NO and also checked "Do not show this message again" and bingo, Roxio works.
Windows Media Player is a bit hit and miss I find. I put in a CD, it finds it, but when I click on a song to PLAY it, the Media Player simply "ticks" the song as being there, moves onto the next one, ticks it, etc. Takes about 30 secs and all songs on the CD are "found" but cant be played.
Restart Media Player after killing its Service, and it's fine. Bit hit and miss.
Loaded windowsblinds (is that the name - to change the skin etc?) and my system just semi-froze with odd looking fonts/screens. No problem, found - after 10 minutes trying to find my way thru a 'blanked out' Control Panel!! and did a System restore, all good.
Good day...I got Windows 7 up and running just fine. I like it more than Vista which I incidentally really like too. Next...time to explore Libraries....