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Windows XP PC continuously reboots

Posted on 2004-09-15
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Last Modified: 2012-05-05
Windows XP
I dowloaded XP Service Pack 2, I also unchecked system restore option due to many viruses on my system. Computer now reboots gets to windows screen then reboots, it is in a loop, even if I choose safte mode, it reboots. I can not get into anything.

Background Info:
I was cleaning up viruses and spywhere with AVG and Spypot prior to XP service pack download.  Have persistent pop of of Trojan Horse Backdoor.Agent.BA that I can not get rid of as well.

Can you direct me how I should proceed on 1. How do I get out of PC reboot loop? 2. How do I get rid of Trojan Horse.

My next step I was thinking was to reboot from a: drive, but then what do I do from there?
Thanks very much. I have no PC now and can not do my work at home any longer.
Pat
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Question by:knorrtech
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SheharyaarSaahil earned 500 total points
ID: 12065356
Hello knorrtech =)

First try uninstalling SP2 from recovery console, as described here:

How to remove Windows XP Service Pack 2 from your computer
http://support.microsoft.com/default.aspx?kbid=875350
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by:SheharyaarSaahil
ID: 12065399
and for Backdoor.Agent.BA trojan, u can try running this Removal Tool in Safemode to check if it can kick out it from ur system >> http://securityresponse.symantec.com/avcenter/venc/data/backdoor.agent.b.removal.tool.html

Post Back and Good Luck :)
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by:SheharyaarSaahil
ID: 12065424
And Here are some Basic Tools and Instructions on How to Clean ur System from spwyares\malwares\trojans, if u want u can follow them after fixing the above two problems :)

Download these tools and install them:
========================================================
AdAware ==> http://www.spychecker.com/program/adaware.html
SpyBot  ==> http://www.spychecker.com/program/spybot.html
SpySweeper >> http://www.spychecker.com/program/spysweeper.html
SpywareBlaster >> http://www.spychecker.com/program/spywareblaster.html
CoolWebShredder ==> http://www.spychecker.com/program/coolwebshredder.html
Stinger >> http://vil.nai.com/vil/stinger
========================================================

Then Disable ur Messenger Service if its running >> http://www.itc.virginia.edu/desktop/docs/messagepopup/
After that Follow these Instructions:

1. Restart ur machine in safemode and Login as Administrator
2. Run the AntiVirus tool and delete all viruses it found
3. Run the Spyware Removal tools and delete everything they detect
4. Then goto My Computer>Tools>Folder Options>View and turn on the feature of Show Hidden Files
5. Goto C:\Documents and Settings\ur usernmae\Local Settings\Temp and delete all files present here
6. Goto C:\Documents and Settings\ur usernmae\Local Settings\Temporary Internet Files, and delete the folder of ContentIE
7. Goto C:\Documents and Settings\ur usernmae\Cookies, and delete all cookies present here.
8. Goto C:\Windows\Temp and delete all files present here
9. Reboot back in Normal Mode and check if problems are gone or not
10. Good Luck :)
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Expert Comment

by:daveteq
ID: 12065439
I had this problem 2 months ago.  after researching it, I finally realized I had to do an XP repair install.  It was pretty smooth, and didnt require me to reinstall everything, except the service pack.  do a search on how to do a repair isntall. caution: don't do a repair isntall wtih recovery console.. that's a different thing. click no to that.
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by:knorrtech
ID: 12070492
Tried both options, once the recovery console, but it placed me at C:\ could not cd to windows could  not do a dir, then I restarted to do a setup, hit f8 to accept then it gave me my partitions and did not give an option to recover, it wanted me to format my disk and that was all.

Think I need to reload OS?
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Expert Comment

by:SheharyaarSaahil
ID: 12070525
hmmmm read this.....

Warning!! If the Repair Option is not Available
http://www.michaelstevenstech.com/XPrepairinstall.htm#warning2

if it works then great, otherwise take out ur hard drive, hook it in another system as slave drive, copy ur important data to the second pcs's hard drive.

Then hook back ur hard drive in ur system, boot with the XP CD and perform and Format and Clean Install of XP.... after u get the system up and running..... u can copy back ur data to ur system !!

Good Luck :)
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