svchost error on start up

I am new to BleepingComputer, so forgive me if I blunder a bit.

I have a dell dimension 5150 with xp pro sp3. I started getting this error on start up.

"Svchost.exe: "the instruction at "0x00000000" referenced memory at "0x00000000". the memory could not be "read"

I tried to search the forums for this and must not have done it right, for I got nothing on point.

I just ran combofix. I have norton 360 4.0. I use ccleaner. I use auslogic disk defrag and optimize.

I suspect it may be a windows services setting or registry entry, but I have no clue, really.

Hi again,

Well i see you said you ran combofix:

ComboFix usage, Questions, Help? - Look here

Unlike what many people think, Combofix is not a fix-all program that's just "run and done". It is a highly specialized tool that should only be used under the supervision of an expert. It's not an "everyday use", clean-all program.

If you suspect malware, please post a new topic in the Virus, Trojan, Spyware, and Malware Removal Logs sub-forum, with a description of the issues you are having and the contents of the log file (copy and paste the contents of the log into your topic, don't attach it). Please note: the Malware Response team are always overwhelmed, and it could take a few days to get your first reply. Just be patient and don't "bump" your topic by replying to it. You will also likely be scolded for running Combofix without supervision.

If you don't suspect malware and just ran Combofix for no good reason, please uninstall it by typing the following into the "Run" box and pressing Enter: combofix /uninstall

Now as for your problem i suggest you post in the malware removal forum and post the combofix log just to be sure.