Well, that explains it a bit more.
Avast works fine with XP SP3. The only thing I would suggest if you want to re-try avast! is a clean install. This normally fixes nearly all issues that are not known. It is most likely a corrupt install that happened. Here are a few thread examples, though they are not related to your BSOD, they all occured after a program update.
https://forum.avast.com/index.php?topic=168064.0https://forum.avast.com/index.php?topic=168013.msg1194676#msg1194676If you try the clean install and it does not fix your issue:
It's either an issue with avast
Another software is conflicting with avast
Your PC may be infected with malware
I could also get attention to this thread from a malware analyst to see if there are any issues with the system if you are willing to.
Perform a clean install:
Note: It's important you used the stub online installer from the one I linked.. NOT the offline one.
Note: You need to be ONLINE during this install (online installer works in all cases whereas offline sometimes doesn't)
1.Download your version of avast! and the avastclear tool:
Avast Free AntivirusAvast Pro AntivirusAvast Internet SecurityAvast PremierDownload
Avast Clear Tool2. Uninstall Avast by control panel [If you don't have Avast in control Panel go to #3]
3. Uninstall in safe mode using Avastclear. [Running Avastclear is normal mode will give a prompt to go into Safe Mode]
Check : Once uninstalled check in device manager>view>show hidden devices if there is anything related to avast with a yellow triangle.. if so, uninstall it and reboot.
5. Install the version you downloaded.
6. Reboot.
Free: If you have the Free version, register the product for free for a year from the avast! UI.
Paid: If you have a paid license, insert the license key/activation code after the reboot at stage 6.
If you have any questions, please don't hesitate to ask. It's better to ask than make a mistake and start over again with the process.