Hi Cyndeew,
I have checked the faqs page and one of the likely causes that you are unable to perform a Smart Update could be.
"The problem you are experiencing is generally due to one of the following reasons:
Check that you have the latest version of Spyware Doctor - You can check the version number by clicking on the 'Help' button and then 'About'. The current version is 4.0.0.2621 (also known as 4.0). If you need to upgrade you can download Spyware Doctor 4.0 from:
www.pctools.com/spyware-doctor/upgrade/
Spyware Doctor settings configured to 'Direct Connection' - Follow the steps below to allow a direct connection to Smart Update within Spyware Doctor
Change Connection Setting:
1. Go to 'Settings' in Spyware Doctor
2. Choose 'Connection Settings' under 'Pick a Category'
3. Check the option 'Use Direct Connection'
Internet Connection - Ensure you are connected to the Internet when attempting to perform a Smart Update.
Firewall / Proxy Server - You may need to temporarily disable your firewall or proxy server to perform Smart Update, as these programs can sometimes interpret the update function as a malicious process. If your software supports it, can you please place 'swdoctor.exe' and 'update.exe' on your firewall or proxy server's 'Allowed Processes' list. This will permit you to run future Smart Update with your firewall or proxy server enabled.
Virus Scanner - You may need to temporarily disable your virus scanner to perform a Smart Update, as these programs can sometime determine the download as a malicious process. Please remember to re-enable your Virus Scanner when Smart Update has completed."

_Chippa_