G'Day n48,
1. - The 1st major problem we have is the number of Internet Security, Ant-Virus, -Malware, -Trojan, etc. programs you have installed on your PC.
You need to understand that in the majority of cases (yours is one of these) that attempting to install any type of a parasite (Virus, Trojan, Malware, Spyware, Adware, etc infection) protection or remover after the infection has already occurred, does not work in 99% of instances. The remaining 1% where it can be removed, is by downloading specific removal programs and being able to start the PC in safe mode and or from a special boot CD that contains the remover program.
You already experience the problem by not being able to boot in safe mode, caused by one of the infector Trojans or any others that have since been downloaded and continue to add more infections.
2. - The 2nd problem is by the detail you have given for the current infection, which contain multiple Trojan and Virus downloaders, some of which hide themselves in different folders everytime you re-boot your PC.
A: "this windows service appears to be hiding using this rootkit techniques:
c:documents and settings/user name/application data/srosa.sys
B: the program is loaded by the following (hidden) registry key:
hklm/system/currentcontrolset/services/srosa
C: this file has a known malware filename
appears to contain: Trojan.Downloader.Bagle"
Details.
A and B: srosa.sys
SROSA.SYS is Trojan-Downloader.Win32.Bagle.cu.
Related files:
%System%\drivers\hidr.exe
%System%\drivers\srosa.sys
Click on this link for ->
Details of the Trojan-Downloader.Win32.Bagle.cu and its PayloadC: Trojan-Downloader.Bagle
Name: Trojan-Downloader.Bagle
Threat Level: High
Description: Trojan.Downloader.Bagle runs in the background and attempts to download malicious files from the Internet without the users knowledge.Type: TT_Downloader, TT_Trojan
Also known as: Trojan-Downloader.Win32.Bagle.ad [ Kaspersky ] Win32/TrojanDrop
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Details of the Trojan-Downloader.BagleThese will not be the only infections you have on your PC as there are 100's of variations of these and more than likely you will also have the Smitfraud, Vundo and others, all part of this scenario and the consequence of the Trojan Downloaders.
In the majority of cases it is best to format the Hard Disk and re-install the XP Pro operating system from scratch, as the recovery and removal of your infections may not be easy. In fact it will take quite a few hours and good computing knowledge on your part to be able to follow instructions, E.G. knowledge of editing the registry etc.
Unless one of the experts from BitDefender has a simple solution that we can try, the alternative is a very long session to remove the multiple infection from your PC.
I am sure that one of the Moderators will be watching this and get involved if they have a solution which I will wait for! If we do not get a simple solution in the next 24 hours, I will come back and attempt to help you to remove the current threats. ( I have done so before! - but takes time and effort)