help ,virus stopping all known AV software from running

[toddskins7]

please help, this is first time posting here but i have read articles hear before to solve problems, but i have a good one now. i was updateing a friends (with dialup) comp. Win XP pro. it only had SP1 so i hooked up to download sp2 +3. he didnt have anti virus so i put AVG on it. it installed but would not update( said bad binary batch) sorry didnot copy any info at this point. so i put mbam on it. it installed but would not start. mind you the computer is not showing any signs of virus( ie: rougue spyware screens, fake intruder warnings, copyright fines, etc. ) so i treated like virus starrted by running rkill would not start, or sometimes would get dos screen then just dissappear. ran rootrepeal, wont start or will get to first screen ,where yopu would select file and scan, then it will dissapear. in task manager process lsass.exe keeps showing activity off and on constantly and also process csrss.exe is acting same. when i had connected to my network, even when auto update was not running my transmit on my modem would be showing activity but i could never find any appliocations running. am frustrated because i know something is going on but i cant find it. will do whatever actions are suggested and post what is required, am slightly better than novice user but no tech guy. please help. thanks

[marktreg]

Hello toddskins7, and welcome to malwarebytes.org

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