Logon freezes after Welcome screen

[Jackpine]

As of today, when I start Windows XP Home, the Welcome screen appears no
problem. However, after logging on as a user, my desktop and icons appear
along with the following message:

svchost.exe Application Error
The instruction at "0x7c9111de" referenced memory at "0x00000000". The
memory could not be "read". Click OK to terminate the program.

Yesterday everything was fine. Does anyone have any ideas what happened and
how to fix this? Note: Ctrl-Alt-Del does nothing, i.e., Windows Task Manager
does not appear.
Thank you.

 

[Pegasus [MVP]]

As of today, when I start Windows XP Home, the Welcome screen appears no
problem. However, after logging on as a user, my desktop and icons appear
along with the following message:

svchost.exe Application Error
The instruction at "0x7c9111de" referenced memory at "0x00000000". The
memory could not be "read". Click OK to terminate the program.

Yesterday everything was fine. Does anyone have any ideas what happened
and
how to fix this? Note: Ctrl-Alt-Del does nothing, i.e., Windows Task
Manager
does not appear.
Thank you.

Have you tried booting up into Safe Mode?

 

[R. McCarty]

A program fault. Svchost is a container service that handles or runs
other small services. As Windows boots it loads and executes the
Svchost instance ( There are usually more than 2 ). One of the entries
in the Svchost instance made a call to non-existent memory location.
This caused the fault and message you note.

The key is whether this fault occurs on every boot. If it does you'll
need to investigate what entries are loaded with Svchost and try to
locate the offending entry.

 

[Don Phillipson]

As of today, when I start Windows XP Home, the Welcome screen appears no
problem. However, after logging on as a user, my desktop and icons appear
along with the following message:

svchost.exe Application Error
The instruction at "0x7c9111de" referenced memory at "0x00000000". The
memory could not be "read". Click OK to terminate the program.

Yesterday everything was fine. Does anyone have any ideas what happened and
how to fix this? Note: Ctrl-Alt-Del does nothing, i.e., Windows Task Manager
does not appear.

Did you attempt System Restore to an earlier date?
ISTR WinXP Home disables this by default, but Admin
users can enable it (for all users.)

 

[Jackpine]

I will try System Restore and report back.

Did you attempt System Restore to an earlier date?
ISTR WinXP Home disables this by default, but Admin
users can enable it (for all users.)

 

[Jackpine]

Can't go to system restore. After I click on Start, then Help and Support
(to access System Restore), nothing happens.

 

[SC Tom]

Can't go to system restore. After I click on Start, then Help and Support
(to access System Restore), nothing happens.

Try Start, Run, and enter c:\windows\system32\Restore\rstrui.exe
Hopefully that'll bring up SR.

SC Tom

 

[Johnw]

Jackpine explained :

Can't go to system restore. After I click on Start, then Help and Support
(to access System Restore), nothing happens.

More on system restore

1. It's a good practice to shut down all other applications before
using System Restore, as it requires a full-system reboot to complete
the installation. Connecting to the internet is not required, however.
So shut all applications.

If System Restore doesn't work in Normal Mode, it might work in Safe
Mode.
Toggle F8 or Press Ctrl ( depends on your comp ) during bootup ( just
before, verifying DMI pool, message comes on )
Select Safe Mode.

http://www.microsoft.com/windowsxp/using/helpandsupport/getstarted/ballew_03may19.mspx
http://bertk.mvps.org/index.html

 

[Jackpine]

Success!

I booted into Safe Mode, then used System Restore. The computer restarted
and everything works fine again.

Thanks to the community for all the help! I wonder what caused this problem
though, in the first place, and is there anything I can do to prevent it from
happening again?