Unable to update virus definitions since latest version

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Dear all,

I am using 1489 (free version) on Vista Home Premium 32-bit (no service pack). Since updating to the latest version of the program, I have been unable to update my virus definitions successfully. I begin the update process manually each morning, but the 'Overall progress' bar freezes at 50 percent on step 2 of 2 on the VPS screen. There is no longer any 'cancel' button, so the screen stays frozen until I shut down my PC at night. The same problem occurs the next morning for the past three days. Avast appears to be working well in every other respect.

I am not sure if it is merely the update screen that has frozen, but the definitions have been updated, or if the process has indeed failed.

I have 4GB of RAM, Intel Core2 Quad CPU Q6600 @ 2.40GHz processor, 40Gb free space of 500GB disk. I have Windows Firewall enabled, but Avast is allowed through. Turning off Windows Firewall did not help. No other firewalls, security software or anti-virus running.

Any help would be gratefully received.

Thanks,

David.

[essexboy]

If you select a manual update whilst Avast is doing an autoupdate you will experience this.  Avast checks for updates on boot and 4 hourly thereafter

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Thank you for your reply, Essexboy.

I had Engine and Virus definitions set to manual, but Program set to 'Ask when an update is available'. I have now changed both to manual. Will see tomorrow if this helps.

Thanks,

David