If you had to, would you be able to restore from your backups?
You do backup your system, don't you?
It's strongly recommended that you test your backups
How long ago was your anti-virus profile last updated?
Your software should be set to update regularly. Assuming you've been connected to the Internet you should expect to see the most recent update within the past 24 hours
Do you have Windows updated enabled?
Microsoft issue regular security fixes, you should allow updates to happen automatically, or to at least prompt when there is an update to be applied.
Are your USB Flash Drives encrypted?
If you lost an unencrypted flash drive, would it concern you if the data got into the wrong hands? If you store any confidential or other sensitive data on a USB stick you should look at encryption.
Do you use strong passwords, even if not compulsory?
You won't have the choice with online banking etc, but even if you are not forced to, do you choose to use strong passwords in some cases (for example your email account)?