BleepingComputer.com: safemode and debugging froze

hi im new to the site i was wondering if anyone can help me, i originally has a bad case of viruses infecting my computer couldnt do nothing until i went safemode i used combofix to temporary fix, when combofix to complete fix it went to system critical error and same with Malwarebytes-Anti-Malware as it the system restarted the debugging mode activated i try pushing button to skip the process but key board was not working, but it was working as the debugging try to scan on stage 2 at 15% it stops n froze. I restarted the computer trying to get into safemode med way it froze as well, if you any suggestion please assist i really dont want to spend money for this kinda problem.

Insert the Windows XP CD into the CD drive, and then restart the computer. Click to select any options that are required to start the computer from the CD drive if you are prompted. When the "Welcome to Setup" screen appears, press R to start the Recovery Console. If you have a dual-boot or multiple-boot computer, select the installation that you must access from the Recovery Console. When you are prompted, type the Administrator password. If the administrator password is blank, just press ENTER.

Type: chkdsk /r

It's important to have a space before the "/".

To exit the Recovery Console and restart the computer, type exit at the command prompt, and then press ENTER.