Question about Microsoft Windows XP Home Edition

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AVG 8.0 build 156 (7/25/2008)

I'm on Microsoft Windows XP Home

I have tried three time to install AVG 8.0 and each time it fails with errors 0x80070091 and 0x8007041d.

Have you a method to fix this problem?

I'm a silver surfer, and would like to solve this problem with out the aid of outside help.

Tez

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I can think of several reasons why AVG may not install properly:

1) Make sure that you fully uninstall any old versions of AVG,
as well as any failed or partial installations of the current
version:

a) you will need three utilities to do this, and you should install
these first:

i) File unlocker 1.8.7
=======================
http://ccollomb.free.fr/unlocker/
or Softpedia, Tucows ... etc.
=======================

This is a small resident utility that intercepts windows
"access violation messages" and allows you to rename,
move or delete files locked by Windows.

This utility pops up after all file access errors, displays
the name of the process that is locking the target file,
and allows you to snuff the process, or force unlock the
file. (In extreme cases a re-boot may be necessary, but
it will get the job done)

This utility will help you delete any protected or
share-locked programs and DLL's belonging to AVG.


ii) Registry Workshop: http://www.torchsoft.com/

This utility is a registry editor which is much more user
friendly and much more powerful than Windows Regedit.

Registry workshop offers:
Powerful search and replace, persistent undo log,
delete objects from search results ... etc.

iii) CCleaner: http://www.piriform.com/

This free utility removes temporary garbage files and
orphaned registry keys left behind by incomplete
un-installations or failed installs. It also allows you
to regedit orphaned registry keys, if you need to fix
them rather than delete them, at it has facilities to
back-up the registry, before making changes.


iv) Download and install these products.

2) Use the task manager to stop any AVG processes
that can be stopped, if you still have any.

3) Open the "services" applet and stop and disable any AVG
related services:

Control Panel --> Administrative Tools --> Services

4) Run the AVG un-installation program from, if the link
still exists:

Control panel ---> Add/Remove programs

5) Remove all AVG related files and directories, including
any AVG entries in:

"...Program Files..."
"....Program FilesCommon Files..."
"....Documents and Settings... "

Check all subdirectories, user profiles ... etc.

i.e. Search the hard drive for AVG or GRISOFT
Delete everything with these names.

5) If the file unlocker window pops up, choose:

"unlock all" for any files locked by explorer.exe
"kill process" for any files locked by other processes
"delete" if no locking process is found

If the file cannot be delete, set it to delete on re-boot.

6) You may want to backup the registry before you proceed:

Open the registry workshop and search the registry for
AVG and GRISOFT.

Delete all (complete) sub-keys and values containing these
entries.

Just to be sure:

If a registry key contains the words AVG, GRISOFT in its
name or if it contains values pointing to the path where AVG
used to be, delete the entire key, including any values or
sub-keys it may contain,

Do NOT delete its parent that is NOT related to AVG !!!!

Also make sure the AVG refers to the antivirus, and that it
is not a sub-string of a name belonging to another product
or some unrelated product abbreviation.

The registry workshop does have an UNDO facility, that
remembers the edits form the previous session, even after
you close it, but don't count on it. Backup the registry first,
or export the keys you are changing/deleting to a *.reg file
first, that way you can put them back just by double-clicking
the saved *.reg files.


7) Remove or disable all (resident) competing anti-virus
products, which may conflict with AVG.

Note: Non-resident malware scanners are fine, its just
the resident shields you want to avoid. Things
like Norton's, McAfee etc...

Running multiple resident shields is a very bad idea,
because they really slow down your machine, as well
as conflicting with each other.

Norton's is a very bad idea, period: Very slow, contains
serious spy-ware that silently scans you machine for pirated
products and reports your personal information (if it finds any)
to affected software manufacturers and law enforcement.

This was CONFIRMED by a high level Symantech employee,
who shall remain anonymous. Yes I am 100% certain.

8) Now run CCLeaner to remove any orphaned registry keys
which you may have missed.

9) Reboot the machine and try to re-install AVG

10) IF you still have problems, and if your AVG is legit,
you probably have a virus, Trojan or root-kit specifically
designed to remove and/or block the installation of A/V
products.

Scan your machine with:
Rootkit revealer: from Winternals/ Mark Russinovich
Black light: from FSECURE
Kaspersky AV
McAffee AV
....

Like I said Norton's is bad news,
(except for threat specific removal tools)

Also beware of phoney websites with rogue scanners that
come up with false positives and than try to extort you for
money.

11) If all else efforts fails, you may have to save your data,
reformat and re-install everything.

I have experienced such a root-kit, that took down my entire
network in minutes. Once infected, all attempts to remove it
failed, as the virus spawned a multitude of process that rapidly
healed each other, faster than you could shut them down or
remove bad registry keys. It disabled safe mode, corrupted
the windows kernel to prevent it from detecting its files, created
filenames with illegal charters and hundreds of registry keys
with embedded nulls which made them difficult to remove
quickly.

The virus also detected products like AVG, and instantly
deleted them upon installation. After a week of lost
productivity and tens of hours wasted with Microsoft tech
support I finally reformatted the affected hard drive.

Good luck, please rate my answers.
Martin.

Posted on Jul 30, 2008

  • Martin J Stadler
    Martin J Stadler Jul 30, 2008

    Sorry I ran out of characters, here is a summary:

    AVG is a very good and solid product,
    even though the GUI could still use a little
    more "ergonomic clarity".

    If AVG will not install, there is a good reason for it:
    ---------------------------------------------------------------------------

    0) You are not an administrator or you have limited
    system access privileges.

    1) Incompletely removed prior installation

    2) Conflict with another product, which is mis-identifying and
    blocking AVG as malware (based on bad heuristics)

    3) Damaged AVG installation files

    4) Incorrect Windows settings: File security... etc

    5) Incorrect Registry key security settings, locked keys..etc.

    6) A Trojan, virus or a root-kit, silently blocking the AVG
    installation. (quite possible)

    7) Incompatible hardware (unlikely)

    8) Also, you may want to upgrade your windows to XP-Pro
    service pack 2. (service pack 3 has issues).

    The pro version has better security settings and features.
    Avoid the media center version, unless you want DRM
    rammed down your throat.

    For the same reason, and a thousand more, avoid VISTA
    like a case of social disease.

    Martin

    Martin





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  • 59 Answers

Try removing AVG through this tool and

http://www.avg.com/download-tools

then try again

Posted on Apr 12, 2009

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