100% CPU usuage,help please (RESOLVED)

Greetings fellow helpers out there

I had this annoying problem.My Computer recently had a problem that is,after I switched on the com for about 1hr or so,The CPU usuage just instantly jump to 100% and back to the normal again.The "jumpings"of 100% and to normal just keep on repeating and led me to no choice but to press the reset the button to restart my com.
The 100% usuage dont stay there forever,it will like,somewhat,"lag for a few sec as it was 100% usuage and back to normal speed again when it was back on the normal cpu usuage"

I found that that process that is using up my CPU Usuage
The process is "WINLOGON.EXE"
When I tried to end this process,it says," that it was a critical system process.Task Manager cannot end this process""

I tried scanning for virus using
Ad-Aware SE Professional
Spybot - Search & Destroy

Those progarms found some virus and I cleared them all but the problem is not sloved.

Anyone who can help me on this?

My System:
AMD Athlon(tm)XP 2400+
2.00 GHZ,512 MB of RAM

My Hijackthis log,
Thanks

You have acquired an email worm. Many worms can be prevented if you are running a real-time (always on) antivirus tool - recommendations later.


Read over the following directions. Ask if anything appears unclear to you.



Clean out TEMPORARY FILES procedures:
To clean your temp folder, recycle bin, etc..please download this free tool:

CCleaner http://www.ccleaner.com/downloadbuilds.asp

Install Options:

• Don't install any Toolbars, or other programs, should it ask you!
• Just uncheck the option of installing the Yahoo toolbar.

It will put a shortcut on your Desktop.

Do not run CCleaner until requested later.





We will be restarting into Safe Mode later on in the fix and you might not be able to access the Internet. Accordingly, it is probably a good idea to print out the following directions or copy them to a text file on your desktop using NOTEPAD. Read these instructions carefully and feel free to ask if you're unsure about anything.

SELECT HijackThis FIX ITEMS: Scan with HijackThis and place a check next to these items:

O20 - Winlogon Notify: mszsrn32 - C:\WINDOWS\system32\mszsrn32.dll

Make sure that all browser windows and internet links are closed, even this one!
CLICK ’FIX CHECKED’ with HijackThis.



HIDDEN FILES: To make sure you can see all hidden files, please follow the directions here

SAFEMODE: Boot into safe mode by tapping the F8 key at restart and choosing 'safe mode' menu option (explained here if needed).



Delete TEMPORARY FILES: Now, use CCleaner to hunt down the most common temporary file locations and the temporary file clutter contained therein (and of possible malware hiding places):

Run CCleaner .

FIRST-TIME USE:
Select the ‘Options’ BUTTON option (top LEFT), ‘Advanced’ BUTTON, and then UNCHECK the ‘Only delete files in Windows Temp Folders older than 48 hours’.

Select the ‘Cleaner’ BUTTON option (top LEFT), if not already selected. Use the ’Windows’ TAB up front by default.

• Uncheck ‘Cookies’ option (advisable)
• Optionally, Uncheck ‘Recently Typed URLs’ option (potentially still useful)
• Click the ‘Analyse’ button.
• Thereafter, click ‘Run Cleaner’ after you have reviewed what it proposes to clean.

***** Clean out the Recycle Bin for items removed below, ONLY once you have regained the full functional use of your PC.




Navigate to these files or folders using Windows Explorer (OR Start -> Search) and delete (if present):


DELETE FILES:

C:\WINDOWS\system32\mszsrn32.dll




POST A REVISED HIJACKTHIS LOG for review:
Reboot and post a new HijackThis log with any feedback as appropriate - how things are now behaving: any new or remaining apparent issues.

__________________
Vincent P

MALWARE: READ FIRST Procedures:
|_ SpyBot V1.5 _|_ HijackThis LOG __V2.0.2 _|

__
ASAP: promoting a high standard and quality of security support no matter where you seek help.

I just did what you guided me to.
As the problem only occurs after I booted my com for 1hr,I will keep you updated later on

The Freezeing of com is sloved but I get slight lag still...

The lack of a real-time (always on) antivirus tool probably allowed the worm to invade your PC - you need such a tool to be running. Here are some good free Antivirus programs that are decent, including AVG and Avast!.
AVG: http://free.grisoft.com/doc/1
Avast: http://www.avast.com/eng/avast_4_home.html




Download ComboFix from Here or Here to your Desktop.

• Double click combofix.exe and follow the prompts.
• When finished, it shall produce a log for you. Post that log and a HiJackthis log in your next reply

Note: Do not mouseclick combofix's window while its running. That may cause it to stall

__________________
Vincent P

MALWARE: READ FIRST Procedures:
|_ SpyBot V1.5 _|_ HijackThis LOG __V2.0.2 _|

__
ASAP: promoting a high standard and quality of security support no matter where you seek help.

It deleted my Internet Explorer shortcut at my desktop =.=

Anyway,heres the ComboFix log


And the hijackthis log

May I know where does IE7 installs to?The directory,i mean.
I re-installed my IE7 and it did not create a shortcut for me.
I searched my C drive,progarm files/internet explorer but its not there...
And the WINDOWS folder "IE7"theres a shortcut file for IE but its an older version not IE7...
Im sure IE7 is install as I can open it throught the MSN mail box button
SOrry if you dont use msn but IE7 is installed

Edit:Found it,I forgotten to turn on show system files xD

How is your PC now behaving?


The lack of a real-time antivirus checking tool continues to put your PC at serious risk. Another alternative that I use and recommend is NOD32 ( www.eset.com ) - you will almost forget it is there (30 day free trial).

__________________
Vincent P

MALWARE: READ FIRST Procedures:
|_ SpyBot V1.5 _|_ HijackThis LOG __V2.0.2 _|

__
ASAP: promoting a high standard and quality of security support no matter where you seek help.

The "lag" has gone now,I will post a reply if something happens again,if not I think the problem is sloved.
Thanks

And those free anti-virus software are all trial version?
Do you know of any those free and not trial version?

AVG and AVAST have FREE versions.

__________________
Vincent P

MALWARE: READ FIRST Procedures:
|_ SpyBot V1.5 _|_ HijackThis LOG __V2.0.2 _|

__
ASAP: promoting a high standard and quality of security support no matter where you seek help.