If you get a chance, you might think about opening an Administrative Command Prompt and running the System File Check. It may demonstrate some problem with your system files and hopefully fix them.
sfc /scannow
Is your All-in-One printer on a wireless connection? All-in-One printers may require several drivers installed for the different devices... Do you have the install media for it, or did you download that?
Do you have the folders and File the printer seems to indicate is not present? You may have to unhide files to see the AppData folder and maybe even set the folder view options to show system files.
When it comes to banking account access, be very careful. Perhaps the best thing to do would be to ask the bank.
Windows 7 used to be able to install over itself, if I remember correctly. Having the DVD in the Drive and starting the install from there may do that and be able to keep your personal information. I never had an OEM Windows 7 system, so not really sure if a downloaded DVD will work with an OEM install.
Getting the system to boot to the DVD can be a little problematic. You have to hit the key early and keep tapping it. When the message about booting to the DVD comes up, you have to be quick to hit a key for it to do that.
And of course, there may be occasions where anti-virus or firewall software can limit access to certain things and cause problems.