How did you do it? I mean, “disable the driver”? Autoruns?
OK guys, I finally solve this problem…I guess that there is some problem related to reputation services and streaming updates…Well, I notice that this service now starting much faster with new version…precisely immidiatelly after boot…so there was some conflict…Well try this…In Settings>Troubleshooting just mark DO NOT USE CHROME AS MY DEFAULT BROWSER…I solve my problem…boot time is know FAST LIKE BEFORE…I guess that this issue is related to users who don’t have Google installed on their PC-s. Hope this helps
I have no problem with boot up problems.
Why would I check DO NOT USE CHROME AS MY DEFAULT BROWSER when Chrome is my default browser and has been for ages ??? 
Well, that’s why you don’t have boot up problems…because you have installed google chrome…but users like me who don’t have google chrome installed on their PC-s (i have only IE9) have boot up issue…For example, my welcome screen was 60 second’s…and after this change it took just 8 second’s on fresh new installation of Win7…I think (this worked for me) that IE9 users must mark DO NOT USE GOOGLE CHROME AS MY DEFAULT BROWSER. New version of Avast instantly put services at start up so there is some service that try to establish route with google chrome to early…and because some users don’t have google there was stand by…oh yes some users resolve this problem by marking Only start avast services after system services…but i think that this is better way of resolving this… ;D I hope that I’ll help someone
No bootup slow down for me and i haven’t checked the DO NOT USE CHROME AS MY DEFAULT BROWSER box and i also dont have google chrome installed, see sig
Slow boot up for me since I upgraded (Gui) to latest version. Other functionality working OK. Please note in that I refuse to do a clean install has I have done this so many times in the past as it seems the only way to resolve problems with Avast. I am tired of Avast updates not working properly from the start and If I uninstall Avast again this time it will be to go to a competitor. Hopefully the folks at Avast will come out with a solution quickly.
Hi
Have you tried what I did? (See separate thread of today)
Not sure if this is a universal solution … I doubt it … but it worked for me. Fast booting now.
Try disabling ‘reputation services’ and let me know 
Have to agree with you. What other product can you name that requires this everytime there is an update:
- Uninstall- Reboot
- Boot into Safe-mode-
- Run aswclear.exe.
- Reboot back into Normal mode
- Reinstall product- Reboot
- Reconfigure all exclusions, customizations (how long does this take??)
- Cross your fingers and hope the next update doesn’t do one of the following virus like things!
a. Slow down boot times
b. Block your internet or email
c. BSOD your pc for no particular reason.
d. Kill your performance during normal operation (firewall buggy- slow- unoptimized)
e. Lose its license details
f. Scan right when you need to work- killing your pc performance.
g. Anything else I missed?
Jeez a virus or malware could waste as much time as avast does lately. I would like to underline your comment: If I uninstall Avast again this time it will be to go to a competitor. Hopefully the folks at Avast will come out with a solution quickly.
Oh and I forgot to mention- this is for the Paid versions! 
Yes…agree with you…Really pain process…Avast team fix problem with streaming updates from last version but that fix now produce other problem in this version (slow boot)…I dont’t know…but only try to disable cloud services for some time till new stable version…I installed avast on top of my fresh installation of win7 (so there is none of other software that can couse conflict…also this is my only AV-i disabled before installation even Windows Defender) and there was still slow boot problem…I resolve my problem like i describe in later post but seem that it just work for me. No slow boot now…Also I’m comp technician and I installed avast on some other machines with Win7-32bit and there was still boot problem Hope that new version will be stable :-\
Never understood why it is necessary to disable the stock Windows Defender installed by default with every Win 7 OS. If avast can’t/won’t with Defender, then the installation should NOT proceed without warning you or requesting to disable it first. :
It isn’t necessary but it’s duplication since avast! already does that for you.
Yap it isn’t necessary…they play nice together…but if you choose in avast option to scan PUP-s than it’s duplicatation…also WD never catch anything in 4 years…on other hand avast never let me down in terms of protection…i only scan my pc with malwarebytes and emsisoft emergency kit from time to time (and also they don’t catch anything)