Can't start safe mode

I am having a little issue. I have recently obtained the rogue virus lsas.blaster.keylogger. It has pretty much hijacked everything except firefox. I need to boot my PC in safe mode to run Malwarbytes but i am having a problem. I can get to the menu to select Safe Mode, Safe Mode with Networking and Safe Mode with Command Prompt just fine. However when I select any of these 3 options my PC just reboots and comes back to the menu. On the flip side i can start windows in normal mode just fine, but cant do anything because of the virus. Does anyone have any idea what would be preventing windows from booting in safe mode or how i can get it to.

Thanks in advance,
Sry if this isn't the right forum

I was experiencing a problem like the originator of this thread. I tried the above and am having major problems. My computer, despite being told to start in safe mode from the 'boot.ini' tab, still will not start in safe mode. I get an error message telling me it won't start in safe mode and now, unlike before, I can't boot up at all. No matter which choice I make (safe mode, safe mode with networking, safe mode with command prompt, last known good configuration or normal), the computer cycles for a second and then drops me right back into the safe mode screen from which I can't start up. It is an endless cycle.

Is there a way to undo what I did to the boot.ini file? This is driving me NUTS.
Thanks,
Randy

It says:

"We apologize for the inconvenience, but Windows did not start successfully. A recent hardward or software change might have caused this.

if your computer stopped responding, restarted unexpectedly or was automatically shut down to protect your files and folderse, choose last known good configuration to revert to the most recent settings that worked.

If a previous startup attempt was interrupted due to a power failure or because the Power or Reset button was pressed, or if you aren't sure what caused the problem, choose Start Windows Normally"

Then the options are listed
Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt

Last known Good Configuration (your most recent settings that worked)

Start Windows Normally

Then it says, "use the up and down arrow keys to move the highlight to your choice.
Seconds until Windows starts:" then counts down from 30

Doesn't matter which of the five options I choose, they all cycle back to the same screen after a few moments of attempting to boot. During the few moments that it does try to boot, a blue screen with some text on it pops up for less than one second - such a quick flash that I have no idea what it says.

Any ideas would be appreciated. Thanks

there is nothing there that should prevent booting up at least into safe mode. There must be something more fundamental wrong with the system. have you tried inserting the windows xp cd? that may break the cycle and provide you with a different set of options.