you need to provide more details about the settings for avast!
For example:
Please check the following to check the settings:
Open Avast GUI > Settings > Updates >
A. Engine and Virus Definitions:
- Automatic Update (default)
- For “Manual” or “Ask When Update Available ” > Settings > Status Bar > Uncheck the last box
B. Update Parameters: all boxes unchecked (default)
- If you use DSL, you may want to set #2 above to "My computer is permanently connected to the Internet."
- If you use dial-up, you will want to use #2 above to "I only connect to the Internet using dial-up modem."
C. Proxy Settings: Auto Detect using IE Settings (default)
- Some people have found that using "Direct connection / No Proxy" have worked for them.
- Use "Specify Proxy Server" if you use a proxy and complete the information below it for the proxy server > click "OK."
Please tell us your settings.