No BSOD but freezes constantly has to be hard restarted everytime

Trying to help a friend with a HP dv2000 Pavilion Lap top running on upgrade from Vista to Win 7 Pro with 4Gb RAM. The machine worked fine since the upgrade (8 months ago), he went to France (2 weeks ago) and went to a free Wifi spot and the bother has occurred since. I think there was a update that was not installed correctly. The machine will boot-up as usual with no problems but as soon as you start any multiple tasks the load icon just spins and explorer becomes non-responsive and will say so, sometimes it will return but the majority of times its a hard-restart to get back to operation again. If you try to shut-down by the normal process it will hang for ages and give you a black screen with the cursor still on-screen and moveable and need a hard restart. I have done a system restore to a date back in August, I have run the sf/ scannow and it reported no problems found, I have run a memory test which it passed, I have run it on safe mode and everything works fine, I am able to carry out one task before freezing happens so I was able to update the anti virus (AVG 9.0) and restart and do a full scan with no infection showing. But I'm unable to do a Windows update from the start menu or the control panel it just freezes and ctrl+alt+del causes black screen with cursor (moveable) flowed by this pop-up.
"The logon process was unable to display security and logon options when CTRL+ALT+DELETE was pressed.If the operating system does not respond, press ESC or restart the computer by using the power switch". Any Ideas ?

Welcome,

Please upload the msinfo32.nfo file. To get this:

• Click on the Start
• Type msinfo32 into the Search programs and files box
• When it opens, go to File, Save
• Save as msinfo32.nfo and save in a place you will remember
• Let it finish the process of gathering and saving the system info
• Right click the .nfo file, click send to compressed (zipped) folder
• Upload the .zip file here.

To me the problem is the antivirus installed. There is one dump out of all the dumps that loaded.

Code:

STOP 0x0000000A: IRQL_NOT_LESS_OR_EQUAL 
Usual causes:  Kernel mode driver, System Service, BIOS, Windows, Virus scanner, 
Backup tool, compatibility
BugCheck A, {c0c05480, 0, 1, 82cba4e6}
Probably caused by : memory_corruption ( nt!MiConvertWsleHash+7f )
IRQL_NOT_LESS_OR_EQUAL (a)
PROCESS_NAME:  iexplore.exe

Seeing the usual causes for your bug check, it says "Virus scanner". My suggest to you is to uninstall AVG and everything related to it. It's known to cause BSoDs on some systems. Download and install Microsoft Security Essentials instead it's free, light weight and does not cause problems on the Windows 7 OS.

• AVG | Download tools and utilities
• Microsoft Security Essentials - Free Antivirus for Windows

After these changes, run the System File Check up to 3 times again and then run disk check. Do upload the msinfo file here so that we can list some problematic software to you.

• SFC /SCANNOW Command - System File Checker
• Disk Check

Keep us posted, good luck

So is there any new BSoD on the system? SFC found and fixed the errors?

peadro said:

So far so good. It seems to be running alot better but is still slow at responding to some tasks but it seems to be fixed..cheers

No problem.
We'll keep the thread for a week or so before actually calling it solved.