Avast Freezes Around 250000 Files scanned. Any Ideas?

Hello all, I am a newbie here, and need some advice on Avast.
I am running WINXP (SP2)
Zone Alarm
Ad Aware

Avast will freeze during scanning, you can manually stop the scan, and restart it, but will freeze again. I have removed Avast and reinstalled, and this will fix the problem for about 3 or 4 days. I have been using Avast for about 3 years, and this is the first problem that I have ever had. With many thanks to Avast I can count on one hand the amount of infections that Avast has missed in downloading files, that were found in later scans. I recommend to ALL!

Thank you much, Mike

Does it freeze on any specific file or is it totally random?

… to find out, you can enable creation of the Report file in program settings - and let everything, even “OK files”, be included there.