HP OfficeJet printer won't load following Avast 4.8 update

Help! Everything was fine until the latest update of Avast and now my printer won’t load at all. The screen freezes and I have to switch off. It loads fine if I switch off HP Office Jet printer. I’m running Windows XP. I need the printer urgently - please help!! I’ve spent a few hours trying to crack it myself until I found this forum. Thanks.

avast should block anything… it’s just an antivirus.
Were you using the version 4.7 before updating or this is a new installation?
If you disable avast, will the printer work?
If you boot in Safe Mode, can you print?

Thanks.
I was using 4.7 before without problems.
I disabled avast and the printer now works, have turned avast back on, obviously!