Author Topic: Avast hangs Vista Home Premium  (Read 4986 times)

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Offline lwillisjr

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Avast hangs Vista Home Premium
« on: September 26, 2009, 05:29:40 AM »
I briefly scanned the forum and couldn't find this issue anywhere. I've been an Avast fan for years. I have a new Dell laptop with Windows Vista Home Premium SP2. It is the 32-bit version.

Have tried loading Avast. It seems to load OK, but when I reboot and try to log in, Vista "hangs" at the welcome screen. The only thing I'm able to do is boot into safe mode, uninstall Avast, and then the PC will boot fine. I've tried installing and uninstalling, but can never get past the "welcome" screen whenever Avast is installed. Anyone encounter this?

Offline .: L' arc :.

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Re: Avast hangs Vista Home Premium
« Reply #1 on: September 26, 2009, 06:24:32 AM »
 Do you have any antivirus running alongside avast or any previous antivirus before avast?
Windows 7 (64-bit) Home Premium SP1
avast! 9 RC1

Offline YoKenny

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Re: Avast hangs Vista Home Premium
« Reply #2 on: September 26, 2009, 11:03:39 AM »
How much RAM does the system have?
E5200 2.5GHZ, 4GB RAM, 320GB HD, Windows 7 Home Premium 64bit, avast! V9.0 Free, IE10
P4 2.8GHZ, 1.5GB RAM, 40GB HD, XP Pro SP3 32bit, avast! V9.0 Free, Google Chrome
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Offline Lisandro

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Re: Avast hangs Vista Home Premium
« Reply #3 on: September 26, 2009, 02:03:10 PM »
Any other security program that could interfere? Firewall?
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Offline lwillisjr

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Re: Avast hangs Vista Home Premium
« Reply #4 on: September 26, 2009, 02:49:43 PM »
The laptop has 3gb of memory.  I've turned off Windows firewall and turned off "User Account Control. I see something called Windows defender that seems to be in the OS but haven't figured out how to disable that yet.

Offline Lisandro

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Re: Avast hangs Vista Home Premium
« Reply #5 on: September 26, 2009, 02:57:00 PM »
Neither Windows firewall nor Windows Defender should play a role here. There is no problem with them.
Was there any other previous antivirus in this machine?
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Offline .: L' arc :.

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Re: Avast hangs Vista Home Premium
« Reply #6 on: September 26, 2009, 02:58:51 PM »
 It would be best if Windows Firewall is left on unless you have a third party firewall installed. On the otherhand, Windows Defender is good one, there's no need to disable it unless you have anything to take it's place.

 By the way, do you have any previous antivirus like Norton?
Windows 7 (64-bit) Home Premium SP1
avast! 9 RC1

Offline lwillisjr

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Re: Avast hangs Vista Home Premium
« Reply #7 on: September 26, 2009, 03:03:18 PM »
Someone had loaded a program called "total security", but I had removed it. Possibly there are some elements of it that weren't totally removed....????

Offline .: L' arc :.

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Re: Avast hangs Vista Home Premium
« Reply #8 on: September 26, 2009, 03:09:11 PM »
 If remnants are possible, you may try running these tools:

(1) Hijack This
       HJT will generate a log, please post it here for analysis.

(2) Malwarebytes Antimalware

 By the way, do you remember that last software you installed since this event happened?
Windows 7 (64-bit) Home Premium SP1
avast! 9 RC1

Offline Lisandro

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Re: Avast hangs Vista Home Premium
« Reply #9 on: September 26, 2009, 03:09:49 PM »
I suggest:

1. Clean your temporary files.
2. Schedule a boot time scanning with avast with archive scanning turned on. If avast does not detect it, you can try DrWeb CureIT! instead.
3. Use MBAM (or SUPERantispyware or even Spyware Terminator) to scan for spywares and trojans. If any infection is detected, better and safer is send the file to Quarantine than to simple delete them.
4. Test your machine with anti-rootkit applications. I suggest avast! antirootkit or Trend Micro RootkitBuster.
5. Make a HijackThis log to post here or this analysis site. Or even submit the RunScanner log to to on-line analysis.
6. Clean your Hosts file (replacing it) with HostsMan tool.
7. Disable System Restore and then reenable it again.
8. Immunize your system with SpywareBlaster.
9. Check if you have insecure applications with Secunia Software Inspector.

Specially step 3 with MBAM could help.
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Offline YoKenny

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Re: Avast hangs Vista Home Premium
« Reply #10 on: September 26, 2009, 05:02:44 PM »
Total Security is a bit of a nasty thing to remove so print these instructions out so that Malwarebytes Anti-Malware can run to remove its remnants:
http://www.bleepingcomputer.com/virus-removal/remove-total-security
E5200 2.5GHZ, 4GB RAM, 320GB HD, Windows 7 Home Premium 64bit, avast! V9.0 Free, IE10
P4 2.8GHZ, 1.5GB RAM, 40GB HD, XP Pro SP3 32bit, avast! V9.0 Free, Google Chrome
with hpHosts, MVPS HOSTS files, SpeedFan, WinPatrol PLUS