Is there any easy way of removing spyware from all your windows accounts at
once or do you need to log on into each session and run the spyware
programmes in each session?

If you can't do this, is there any spyware that is capable of hiding in a
windows account that can affect what you are doing in another account? So,
for example, if you are using a computer for banking, do you need to check
all the accounts are clean before logging into your bank account?

Thanks