I don’t know if it’s just me or after I downloaded/Updated Avast 4.8 to Avast 5.0 I seemed to have gotten slower on my computer and after i start up i seem to freeze after 5-10 minutes from the startup. Avast 5 is working fine and everything’s good. When my computer freezes up i can move my mouse but everything else seem “frozen”. I then manually restart the computer by Pressing the ON button.
Is it just me or is there something wrong?
-I’m new by the way, Name’s Anar 
It was an issue I had in beta. There are others with the same issue relating to problems with Cybermedia DVD loading their DVD drivers and things
If you can make a memory dump and talk to Igor or Vlk, they could look at it and try to fix what is causing it.
Most systems see some slowdown after the first couple reboots as you cache is rebuilding. But shouldn’t freeze your pc.
my pc, also slows down when i try to install avast 5 pro. And the worst part is that i cant stop the shields , and i need to uninstall it. So the only way i can use avast 5 is with the free version and my pro key. Also i lost the internet connection. And i have done more than 8 boots and everything keeps the same, my pc not responding. Also i have created a record of my problems during setup, but nobody have answered my problem. So i will stick to v5 FREE, because is the only way i can use v5 of avast antivirus.
I have the same problems previously. But clean install helps me out (with avast uninstall utility).
Well i have tried it also, but no sucess. I only have 5 free, but registered with my pro 4.8 key. Is there a way to upgrade 5 Free to pro, with 4.8 pro key??
Well the thing is i already Downloaded Avast 5 Free Version, previously known as the Home Edition. But like after every start up my computer just freezes and nothing seems to work but my mouse moves fine. This only started happening AFTER avast 5 was Downloaded and Running. Also My computer seems a bit slow, but what can i do to fix this problem? UNinstall and then REinstall?
Try removing the Behaviour Shield (you can reconfigure Avast 5 from Add/Remove Programs). Please tell us if that resolves the problem for you.
Same problem here. Then takes couple of reboots to get to the stage where i can uninstall (reboot) then install 4.8 (reboot).
Tried reinstalling again and it either doesn’t finish the install (reboot). then freezes the PC or seems to install fine (reboot) then doesn’t run at all.
All times i unstalled 4.8 first (reboot) and a couple of times ran the cleanup script after(reboot).
Just wondering if 4.8 still be updated for the foreseeable future and when serial runs out will new serials be accepted?
avast 5.0 freezes my windows xp sp3 and my vista sp2 system i had to uninstall it useing safe mode because it would not all the system to boot up to desktop it just kept freezing up
I also noticed that After it freezes i reboot by pressing the ON button and then my computer works fine. It’s been like this for a couple of days, 1st time i open computer, freezes, i then reboot, then it works fine. Weird…
YUP AVAST 5 PRO SUCKS…i got back to 4.8
Same problem here. Installed new version yesterday and computer kept freezing when I was trying to configure settings.
Task Manager wouldn’t work, Icons on desktop wouldn’t work, and icons in tray wouldn’t work. Only cursor was movable but nothing would click.
Couldn’t even reset computer I had to switch it off.
After leaving it on all night (always do) this morning everything was frozen again, had to switch the computer off and on again to regain control.
Nothing about it showing in Event Viewer. I haven’t installed anything else for weeks.
Still got another 6 months of subscription otherwise I’d uninstall it and get another AV.
NewUser1: Task Manager wouldn’t work, Icons on desktop wouldn’t work, and icons in tray wouldn’t work. Only cursor was movable but nothing would click.
That is exactly what happens to me! I am not alone 
It is indeed wierd as it happens on my XP Pro system regularly.
I tried removing some shields to see if the system did not have enough RAM and it is still failing at first boot up in the morning.
I am only running File System, Web, IM, Network, Script shields and Process Virtualization
I think I will un-install avast! Pro and try avast! Free for a few days.
I will keep avast! as I know the problem will be fixed.
unfortunately I noticed the pc started to go slow while browsing (6 mega connection)…do not know why…but it does. It was a clean install of Avast 5…no problems with avast 4.8 home edition…so I have to go back to it.
will wait a little to go back to 5 if there is something avast perhaps might fix.
???
I’m back on my XP Pro system after un-installing avast! Pro with Add/Remove Programs and aswclear.exe in Safe Mode just to be sure.
I started setup_av_free_eng.exe and chose a Customized install File System, Web, IM and Network shields that completed then system hung when I clicked on Finish
I had to power off then on to recover.
@ despuesvengo
I have a 6MB DSL connection and I am getting these results from Speakeasy
Last Result:http://www.speakeasy.net/speedtest
Download Speed: 6264 kbps (783 KB/sec transfer rate)
Upload Speed: 676 kbps (84.5 KB/sec transfer rate)
Hello All,
I experienced the same problem YoKenny described.
“I started setup_av_free_eng.exe and chose a Customized install File System, Web, IM and Network shields that completed then system hung when I clicked on Finish”
On my system it installed and reached the final screen then produced the message “Error: can’t connect to server”.
I manually rebooted, uninstalled Avast from “Add/remove programs”, ran the Avast uninstall utility. The completed a fresh install of Avast Free 5.0.377. Same result.
So, I rebooted and although Avast Free 5.0.377 appears to be working fine, and shows ‘your system is secured’ with everything green, I am still not completely convinced that it is correctly installed.
In addition, I have also noticed that Avast seems to be raping Firefox 3.6 (http://forum.avast.com/index.php?topic=54176.0)
Hopefully we will receive an official response on this issue from Alwil.
Computer specifications are in my signature.
Avastfan1
This fixed my problem with sites with FLASH bogging down a lot.
;D
Other than that problem, my system actually is a bit snappier than it was before with Microsoft Security Essentials.
I also had to uninstall and reinstall version 5 because there remains an issue that Avast can (not necessarily will) freeze up when using the Help settings. ESPECIALLY if the user is on the Shields screen. This time, I did a complete uninstall and also ran the Uninstall Utility, which for some reason froze on me. I did not know the path filename to put in the box to use the uninstall untility so I searched for “Programs” in Safe mode. There were no Avast Folders from version 4, which I previously installed over when I used Avast for the first time.
Users, I recommend if you download version 5, remove version 4.8 from Add/Remove programs even if its not required. Than after you get it installed, just get a new license key. The versions of Avast 4.8 and Avast 5.0 are SO DIFFERENT that it is better to start fresh rather than carry over.
I will be submitting a feedback form response ticket about some of the above issues on Version 5.
Jack
This sounds like a problem of everything loading at once during bootup, taxing the cpu. Go to settings>troubleshooting and check off “Load Avast! services only after loading other system services”. This gives your cpu a second to take a breath before loading Avast!