Safe Mode and viruses

Hey,
I think i got a virus inbeded in system 32, so to get rid of it i need to boot in in safe mode so i can scan for it (appently).
Except wen i choose safe mode,
it asks me to log on as usual,
then it comes up with a window about "specilist tools" i think
and ask if i wish to continue ( but it goes quickly and gives me very little chance to read it ),
but either way it doesnt boot up and just has "safe mode" in all corners and is just a black screen
and i can't press or click anything
all i can do is turn it off
What can i do to get the safe mode working or get into my computer's system 32 and delete this file

Or any ideas
cheers

Mr IP

Hello.

Which program is detecting a virus? Have you tried running an on-line anti virus scan?

If you would like someone to take a look at the system, please see the information here:
"BEFORE you POST"(READ this Procedure BEFORE Requesting Assistance) Then start your own thread in the Malware Removal Forum

A helper will advise you when available. Regards.

Online scan

No i haven't but i do run constant updates, and its getting worse,
im getting like trojan horses like 5x a day ( which pop up on the screen) which i delete
and my scan last picked up 25 trojans and swiftly deleted them
and i use avg 7.5
i found this on boot up ( i disabled it on bootup) might (prob won't) mean something to you"
"rundll32.exe "C:\WINDOWS\system32\iruevsnu.dll",realset"

Hello.

All malware removal advice is given in the forum setup for that.