I have been using Windows 7 since its first beta. My machine is a notorious Sony notebook with 4M RAM. Sony is another arrogant company next to Apple. Their technical supports will always start saying "We at Sony do not support any software that we don't recommend to use ...." For example, they won't support my machine to downgrade from Vista to XP until almost a year later before they will release the XP drivers officially. I had to search the web for the OEM of the hardware to get the drivers.
With all that said, I found Windows 7 pretty smart and fast and easy to use in spite of little support from Sony. Initially I installed Windows 7 with VMWare then I just took a leap of faith and installed as dual boot with my Windows XP. Early version of Windows 7 didn't even work with my bluetooth mouse let alone all the built-in card readers or camera came with Sony. Gradually the hardware driver problems were solved one by one with each updated beta version. All it said was Windows 7 had come a long way and I really don't think your problem is in Windows 7. There was some pilot error somewhere along and/or the copy you got basically has some error somewhere or somehow.
I am not sure whether you can still download the Windows7.7600.16385.090713-1255_x64fre_client_en-us_Retail_Ultimate-GRMCULXFRER_EN_DVD.iso dated 2009-07-13. That is the RTM (Release to manufacturing not RC, release candidate) version and you can install Home, Professional or Ultimate version from it.
My suggestion is just run down to a store buy a new hard drive or reformat any old hard drive and stick the Windows 7 disc into the CDROM and just do a new installation with your current Windows 7 disc you have on hand. If it does not give you a 30 days free trial right off the bat, you could have a bad download image of Windows 7 or you have never had a good Windows 7.
Windows 7 installation is relatively quick compared to all previous versions of Windows. Don't worry about drivers, with the internet connected, it will find all the basic drivers your machine needed.
I have never learn how to use Vista and have never use Vista even my machine came with Windows Vista Professional and I got rid of it the first day I had the machine. It was a long way that I found you couldn't install Windows XP over Vista in a Vista notebook. I overcame that problem. When it came to Windows 7, I just didn't recall I ran into any installation problems. Only surprise I found was once upgraded cannot go back without brand new installation.